I've actually been thinking about this alot lately, as I just recently built a system.
For over the top, I would probably use a Cooler Master Stacker, and use extra space for water cooling and maybe 6 or so extra SSDs.
AMD 6320 8 core processor * 4 - $1,200
Ehhhh...I have a beef against AMD. Even though intel usually costs twice as much, you can get more than twice the performance out of them.
Could you post a link to an Intel "G34 compatible" processor ?