Nice rig, good deal! Yes, the i7 system is a nice enthusiast system! The only thing I would consider changing is what you mentioned, the gpu. Atm you can get a good deal on any # of gpus in the BST. Enjoy the new system and welcome to the i7 club.
Yeah the 1kw psu is overkill...for now but that is 1 part I will not have to upgrade for a while, I am thinking 2x GTX460's or 2x 5770's,
The previous Owner had this cpu running @ 4.0ghz @ 1.27v so I have that to look forward too.
Yeah exactly. My one friend got a good quality 600W in 2004-2005 (don't remember the brand but it's rated higher than most 600W today) and that's lasted him quite a while and for his system, into the future too.