If you have to get an AMD cpu go with Vishera as its atleast got the best core per core preformance which is what actually counts in gaming. If you have to choose between the 6300 and phenom 2 965. I would take the phenom 2 965 because it has better core per core value then the 6300 without overclocking
Only the 6300 does a turbo mode to 4.1 Ghz. Most of the benchmarks I've looked at put the 6300 above the 965, even in single threaded applications.