dude that will overclock very nicely. it is very similar to my own, i still am staring at this evga 590 sli mobo...haven't installed it fully yet (i ran some tests on my 4200 though) for use with my 3600...but i am planning on doing it in the next couple days. i just had to see how far the ol abit nf4 would go, and it goes to 3ghz and gives up the ghost. not bad
i do agree to go ahead and get the aftermarket cooling. but really man, these things run so cool...you could use the stock hsf. but i think for peace of mind you should have one that is a little more efficient.
also, clockgen is okay for finding the limits of your system, but i never really liked using it...just something about that freeze-up i dont like.
although, i did use it (just to see, lol) how far my 3600 would go before bsod...3.3ghz not too shabby. unstable as f***, but that is about all clockgen is good for.
all in all it will be easy to oc your rig. as far as overclocking...there is a giant difference (for me anyway) going from a 4200 to the 3600. i got a 5-600 mhz max on my 4200...with a lot of hard work and CMOS resets haha, this wee thing gets 1000mhz EASY.