I've considered this but I personally enjoy the user friendly interface that the geforce website offers in terms of games. The AMD UI and CCC is less user friendly and though I have no preference to cards my friend isn't much of an enthusiast and might be playing WoW and I can tell you from experience, research and checking the benchmarks, that for some reason AMD CPUs and GPUs are not friendly with WoW for some reason probably relating to Blizzard being paid off. My 5870 and i7 in my old rig would run WoW at Ultra between 50-60 fps. So I will continue to consider that but with that said if you had to choose which would you believe to go with? Yes the 650 has a tad smaller bus width an the 550 ti seems to be a doing a bit better on the benchmarks out but this may have to also do with drivers since the card is so new.
What's wrong with the 650? Can you please provide some hard evidence to support your claim? I have 2 years in computer science current at a 2yr college and have a very good, fundamental understanding of these concepts so far. I'm still 4 years away. So if you can explain without being too abstract, provide hard evidence perhaps multiple benchmarks. Though saying get this and avoid that is really too vague for me to make a decision. If you're wondering why i'm even asking because some of the benchmarks are different, say different things, have different hardware, and my friends resolution which is my fault is only 1366x768. He may upgrade. If you can explain please do. Thank you :]