Thermaltake Typhoon used to be pretty good. For value though, I will always prefer the Akasa.
3.4Ghz you need to change the muilti again + FSB again.
To Be honest, best bets are 333x9/10 (3Ghz/3.3Ghz) or 400x8/9 (3.2Ghz/3.6Ghz). You might not need to increase the voltage, but then again you might. Try it without and if needed, then increase the voltage. Just make sure you set the memory divider accordingly with your RAM.
~Bex