make sure your auto vcore wasn't too high at 3.2 GHz. see what cpu-z says. you should be able to do 3.2 ghz with near stock volts, even if you idle in the 40's that's ok. see how high you can go with less than 1.30 volts.
GTA4, crysis, the new stalker games, etc were some that I were hoping you wouldn't mention. These games do like big CPUs, but I just can't recommend you getting a 65nm quad for your board and I certainly can't recommend a new board + 45nm quad. with the exception of thuban and lynnfield, all of your "upgrade" options will disappoint you, so I would just go for your highest possible overclock and wait for bulldozer and sandy bridge.