Asus 208X TOP Review
XFX 280X Black Edition Review
I have the Asus card myself, I have nothing to complain about. Don't put too much stock into customer comments, there is no controlled environment, different experience levels and people tend to post more when they have something to complain about.
Regarding the power supply, trust me the CX series is not very good and very hit or miss, the CWT OEM is meh at best. I've seen several builds with burned out and failed units. They sell a lot because they're cheap and it's Corsair so a lot of people assume it's good. They do have good units but this is not one of them. Also higher wattage isn't equal higher quality. The other power supplies I suggested are around the same price +-, risking it with lower quality isn't worth saving a few dollars.