Ok, my last full computer upgrade is pushing 6.5 years ago and I’m still using that system for “gaming.” I think for the last few years my opponents online have been gaming, I’ve just been fresh meat to devour. Anyway, I intend to use this new system upgrade for some light to moderate gaming keeping in mind I seem to like older games: Counter Strike Source, Company of Heroes, Civilization series. I’m looking to keep this system for another 5 years or so with the understanding toward the last few years it’s not going to be anywhere near top performance but I have a high tolerance for imperfect gaming.
Approximate purchase date: In the next few weeks
Budget Range: About $800 or less
System usage from most to least: Gaming, web browsing.
Buying monitor: No
Interested in SLI: No
Over clocking: Maybe but not likely
OS: Plan on using the copy of XP Pro I have
Preferred website: Newegg
Monitor Resolution: My desktop is kept at 1680x 1050
1. If you're not going to overclock why get a "k" CPU? You can get a locked (i.e. non-k) Ivy Bridge quad for $30 or $40 less than your CPU price. If you want to leave the option for overclocking you should pay the extra $10 for the 3570k, and you'll need a Z75/Z77 motherboard.
2. The B75 chipset is really designed for business. If you're not OCing you'd be better off with an H77 motherboard, which you can get for less than the $100 you've allocated.
3. Given your budget a $124 PSU is overkill. You can get a good Seasonic built PSU in the 500-600W range for less than half that.
4. With the savings on PSU, CPU and motherboard you can afford to upgrade your GPU to a 7950. You'll get much better performance, especially years down the road.
5. One thing that concerns me is your plan to re-use your copy of Windows XP. Is it a 64 bit version? If not you're not going to be able to address 8GB of RAM. And is it an OEM or a full license? You may have a problem activating it if it's OEM.
Edit: Example of system you can get for $800 if you don't need OS: