I watercool, so can't help on the CPU cooler except this link.http://www.frostytech.com/index.cfm
Ohh and the proven best by a bit is the Thermalright true with two HS fans in push/pull. There are other ones cheaper and close for sure.
Your OC depends on your Mobo and mem quality, bios ability (you), cooling, and finally just how good your chip is out of the fab. Just get it as high as you can within temp and voltage limits. Take it slow is all I can say.