New build: narrowing it down

I'm still juggling ideas around for my next machine, and I'm curious to see what everybody thinks.
The new rig will be for FS9 (and maybe later FSX) and audio/video editing. That's it. I'll use the old machine for Internet, etc.
I have my own ideas about brands and models of components- what I'm looking for is advice on the basic configuration.
Probably going to go Intel dual-core (I'm convinced I have to get up near 3GHz), but I'm not sure about the graphics card and RAM...
Which makes more sense: 2GB of RAM and a 256 card (more to my liking budget-wise, especially if I spring for the Conroe chip), or 1GB and a 512 card?
Would all that RAM be wasted with a 256 card (I'll be running Premiere as well as FS)?
Would the 512 card be wasted with less RAM?
I'm looking for a dramatic improvement in my simming experience, but I'm trying to keep the total cost below $2000 if I can help it, so I need to compromise somewhere, but I'm not sure where. I'm not looking for blazing-hot performance with Premiere, but it'd be nice to be able to work with large files without it hanging constantly (which is my current problem, mostly due to my tired old 1.8 GHz CPU and less than 1GB RAM).
Another thought: I'm thinking a smaller-size but faster HD (like a 10K rpm 75GB drive) for FS9 only, along with a 7200 rpm 250 or 300GB HD for everything else would be best... I'm also considering a massive external drive, for backups and big files... I'd also like to network the two machins for file transfers (the "gaming' rig will only be open to the world when flying MP).
Any suggestions?
The new rig will be for FS9 (and maybe later FSX) and audio/video editing. That's it. I'll use the old machine for Internet, etc.
I have my own ideas about brands and models of components- what I'm looking for is advice on the basic configuration.
Probably going to go Intel dual-core (I'm convinced I have to get up near 3GHz), but I'm not sure about the graphics card and RAM...
Which makes more sense: 2GB of RAM and a 256 card (more to my liking budget-wise, especially if I spring for the Conroe chip), or 1GB and a 512 card?
Would all that RAM be wasted with a 256 card (I'll be running Premiere as well as FS)?
Would the 512 card be wasted with less RAM?
I'm looking for a dramatic improvement in my simming experience, but I'm trying to keep the total cost below $2000 if I can help it, so I need to compromise somewhere, but I'm not sure where. I'm not looking for blazing-hot performance with Premiere, but it'd be nice to be able to work with large files without it hanging constantly (which is my current problem, mostly due to my tired old 1.8 GHz CPU and less than 1GB RAM).
Another thought: I'm thinking a smaller-size but faster HD (like a 10K rpm 75GB drive) for FS9 only, along with a 7200 rpm 250 or 300GB HD for everything else would be best... I'm also considering a massive external drive, for backups and big files... I'd also like to network the two machins for file transfers (the "gaming' rig will only be open to the world when flying MP).
Any suggestions?