[Derivative]

Hey all, I've been into computers for years but I don't think I'm at the level where I can build one myself just yet. So I went to the local shop to get an estimate and the following is what the guy proposed for 1250$ tax inc. I'm looking for advice if what he provided me with is good or not. Suggestions for what to replace and the such are welcome.

MOBO: Gigabyte GA-Z68-D3H-B3

CPU: Intel i5-2500K

GPU: GeForce GTX550Ti 1GB 192-bit [Debating replacing this with a GTX460 1GB 256-bit]

RAM: Kingston 8GB @ 1600Mhz [Debating switching brands to G.Skill or Corsair]

SSD: OCZ Vertex 50GB [I asked for this mainly to store the OS, making switch from XP 32-bit to 7 64-bit]

HDD: Western Digital 500GB 7200RPM [Debating if I should switch this for Samsung Spinpoint F3]

PSU: Ultra Products 750W [Never heard of this company before, any good?]

Case: Antec One Hundred ATX-Mid Tower

I want to run most games at medium settings @ a resolution of 1440x900 for the next 2-3 years enabling the SLI and OC'ing when needed in the future.