no I don't really prefer one over the other. in my build I have a 1gb 5550, and it hasnt given me any trouble. its my first build, so I have no experience with nvidia. which would be better for light gaming?
absolutely get a 6 pin extension and only hook it up to 6 of the 8 pins and you have a 6 pin connector. or if the card has space the have the extra 2 pins hanging off the sides just plug it in directly
Palit GeForce GTX 460 1024MB Sonic Platinum is best between the two but it will cost you a little more than your budget...........but if you want to stay in your budget then i will strongly suggest to go with with the ATI 5770 over the GTX 460 768mb