I'm working on building an AMD build for light gaming. I mainly do wordsmithing along with moderate graphic & web design work on it. Main considerations are stability and reliability and good quality audio (for highly accurate voice recognition): plan on daily use for at least 2 yrs.
(Planning on Asus M5A990FX mobo -- reviews have said it has very low audio distortion -- with AMD Phenom II quadcore; AM3+ down the road)
For now I'll just use the GT 8600 in my current machine: which will become an auxiliary / HTPC.. But down the road, I want to be able to upgrade to something like a GTS 450 down the road. (My gaming needs are quite modest but I am looking at StarCraft II -- I mainly play RTS games.)
After making my eyes bleed reading reviews for about a week, PSU I'm looking at: (Newegg links with prices: includes shipping, promo & rebates)