Been away from FS, just ordered FSX...

Hi guys, I used to be quite active here (I'm not expecting anyone to remember me lol!) until my old laptop broke and I bought a new one which wasn't good enough to run my copy of FS9.
I've now built a games PC and have just ordered Flight Sim X after putting it off for months.
I have a few short questions...
- Are the default 737s/747s better than they were in FS9 in terms of flight dynamics and features (FMC?) or is the PMDG stuff still the best for FSX?
- My PC specs are in my sig. Will FSX look better than FS9 and still give me atleast 20FPS?
- Are the new multiplayer features used much/worth the price?
Thanks in advance

I have a few short questions...
- Are the default 737s/747s better than they were in FS9 in terms of flight dynamics and features (FMC?) or is the PMDG stuff still the best for FSX?
- My PC specs are in my sig. Will FSX look better than FS9 and still give me atleast 20FPS?
- Are the new multiplayer features used much/worth the price?
Thanks in advance
