I'm not gonna say what case I've chosen yet, because it's not as important as my next question

:
I'm down with the 6600, and the 7900GT (perfect until I decide to go DX10), and I'm convinced an ASUS board will be best... but.
I was going to go with the P5B, it seems like a great deal, but when trying to figure out my hardware needs for networking, I realized that the simplest solution (crossover cable, which I can make myself for free) won't work with that, because the old PC also has only a single ethernet port. So...
I'm thinking rather than spend around $40 and go through who-knows what trouble setting up a network hub (which is dumb for only two machines anyway), or possibly worse yet trying to do this over the USB (which between my printer, dock, mouse, and several sim devices, will be loaded up pretty well), I should probably spend $60 more for the P5B Deluxe, which as far as I can tell, just has another ethernet port and is compatible with some other Intel chips. NewEgg has it on sale, and minus the cost of a decent hub, I'd only be paying $30-$40 more.
BUT- if any of you know of any reason why the deluxe would be a no-no for my sim rig with the aforementioned CPU and GPU (I've been hunting and can find no info), speak now or forever hold your peace

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If anyone's wondering, here's the lowdown on my intended configuration:
PC #1 will be this clunker I'm on right now; AMD Sempron-based, with a CRT, ccurrently supporting my X45, a USB printer, a USB camera dock, and now a USB card reader (dock is too slow, but I like to use it as a charger. Actually, I can disconnect the USB cable from that now can't I?).
That machine connects to the WAN via a Linksys router about 150 feet away (Cat 6), which allows 5 other machines to share a broadband connection.
I use only the stock firewall on the router and the stock XP firewall and Firefox, and have not had a virus or anything other than easily-zapped spyware in over two years, since this sytem went online. I don't download much at all.
What's going to happen when PC #2 is built is this:
PC#1 (after I reformat it- what a mess!) will remain as my main Internet and general-purpose terminal, also feeding component video to my TV for watching DVDs and video files, and listening to music. I have a large sleeping loft where the TV is; I'd like to move PC1 up there so I can hook up a proper 5.1 speaker system to it, and have easy access to the DVD drive for playing discs.
The CRT will stay where it is, and I'll I'll use a KVM switch and RF keyboard/mouse so I can control PC#1 from either location, and also control PC #2 (which will soon be part of a simpit next to my workstation) using the CRT and RF keyboard/mouse. This way I can surf, edit or record A/V, and tinker with FS9 all from my workstation, This CRT is more than adequate for editing video at my current level, and I could probably use the TV for some of that, if I want to lie on the sofa up there. Could be good for gaming, too- we'll see how well my TV handles component off a DVI-to-component converter cable (PC #1 GPU has two DVI ports, BTW; I'll set it for "clone" mode).
PC #2 will have a 20" LCD, the old keyboard (pretty much just for typing Saved Flight info at that point), and its USB will support 4-5 controllers that will be hacked and incorporated into the simpit (I know that's sort of cheesy, but this is "Rev. A" of the simpit, and so far my experiments have been quite successful).
Then, I want to network the 2 machines... I think a crossover cable would be best; the distance from simpit to loft "theater" is about 20 feet, should be OK (total distance to the cable modem will still be under 200 feet).
Ideally, I'd like Internet access on PC #2 for MP flying and downloads direct to the FS9 folder, and I also want to be able to control the printer over the network from the pit on PC #2 (thru the PC #1 USB), and of course do general file-sharing, i.e. rendering video on PC #2 then dumping the files onto PC #1 ( I may also get a big external HD on the PC #1 USB for storing A/V files, photos, backups, etc. prior to backing them up on discs).
I will have a 250GB drive on PC #2 for everything except the sim, but I want to keep it uncluttered as much as possible, so file-sharing is important... if I can do it easily thru the crossover and ultimately thru the crossover to an external drive connected to PC #1 . For the immediate future, I should be fine without an external, except for backup; I've got 200GB in PC #1 just for file storage, and I've been pretty good about burning archival data to discs and believe it or not haven't suffered a catastrophc crash yet.
Thinking again... if I move PC #1 up into the loft, I will need a USB hub or possibly an extender, or I'll have to put the printer, etc. on the sim PC... forgot about that. But whatever; I think I can get away with putting those on the new PC, much as I'd rather not.
That's not so complicated, eh?

I have considerable experience with networks, but not the consumer stuff- mostly proprietary A/V control stuff... so this scenario seems very do-able to me offhand, but I'd love to hear any comments from those who have networked more than one PC and a bunch of peripherals at home.