And yes, I am aware of the driver support with AMD, but I really don't mind it, I am currently running an AMD card, and don't really have a problem with it. I am truly torn and can't figure out which one is better for the price!
Intel Core i5 650 @ 3.2 GHz
ASRock H55M-LE Motherboard
AMD Radeon HD 6450 (piece of crap)
Raidmax 530w PSU
the radeon only has 46% 5-egg reviews. even counting the 4-egg reviews, it only comes to 66%. i wouldn't touch that card. of course the gtx 550 only has 9 reviews total so far, which isn't much to go on.
conclusion: if it were me, i would save up more money and get a higher-end gtx.