Holy smokes! a rich one aren't ya eh?
For the cpu, try to get the venice core if you can it's the latest.
abit mobo's are pretty good so that mobo should work fine. Note this one only has 2 norm pci card slots... so you won't be able to fit a lot of pci stuff like firewire cards or extra usb ports. you could always get a pcie soundcard, so that's not a problem but the intergrated sound for this mobo should be plenty fine.
Now, for graphics cards? hmm, I remember someone saying 2 6800 gt sli's are cheaper and run slightly better than the 7800GTX.. but that would probably only be for games that support sli, so I say the 7800GTX should be sweet.
I havn't heard of silverstone psu's, so I'm not too sure if they're good or not.. gonna have to wait for someone else.
NEC makes pretty decent drives. I say better than LG, that's for sure.
maxtor's do make some decent mid-range hd's I'm sure these top of the line ones should be very stable. otherwise rma and get western digital or seagate.
monitor's good viewsonic and samsung are my 2 fav crt monitor makers.
now, the Zboards.. I think they're a cool concept, but not ergonomic, and buttons are quire spaced out. I think of this keyboard as a trainer keyboard more than a pro-gamers keyboard myself. I like having all my buttons close together. If I were you I'd get like a Logitech Elite keyboard. They pwn, I'mma get one someday once I'mma computer tech n' get store discounts.
that mouse is one of the 2 bests out there. This and the Logitec mx1000 are insanely good. I have an mx1000 so I can say it's worth it for that one, havn't used razor mouse yet, I know a few other people on the forums have, and they say they're good. I think their newest mouse is called "plasma" which uses an infared lazer wich is damn precise.
that headset looks like teh smex man. The frequency range is huge, 18Hz on the low side for headsets is one of (if not) the best frequency responses I've seen.