Only thing I'd suggest (and can look at my comming thread to see what I'm looking at) would be to drop the X-Fi and speakers.

The onboard soundcards are good enough now, and use less cpu cycles than they used to, that you don't need any outside hardware. I also beleive from reading Larry Osterman's blog (and maybe Vyndree or Suvega can add something here, never sure what depts they work in) that all sound under Vista now uses an abstraction layer to do all mixing and effects in software before pumping it out to the hardware..if this is the case then the X-Fi will be essentially doing nothing anyway.

As for the speakers, headphones are good enough ....though if you do want to get full effect from movies and don't currently have a home theatre then it could be useful but just for games and music I nearly always use my headphones.