Great post, tons of useful here for people with questions.
For reference with anyone without a killer system, I ran the last 2 or so beta builds on my non gaming system (Athlon II @ 2.7ghz, AMD 5670, 6 gigd of DDR2) to see how it would run @ 1680 x 1050 @ medium settings and the verdict is pretty darn well; 30 fps consistently, with only dips being in major cities, world bosses and Ops, and only then down to 20-25.
AMD's Bulldozer CPU's launch sometime in October, I recommend waiting until a least the end of the month if you are looking to purchase a computer.
From what I've seen, Bulldozer is a bust.... roughly equal or worse than a comparable Phenom II. Sandy Bridge for gaming builds, Phenom II 955's for budget builds. Or wait till Ivy Bridge hits in a couple months.