Not sure what to go with - CPU heatsink for a Q6600

[AndyD2k]

I was deciding between a Thermalright Ultra 120 or a Tuniq Tower but it looks like I'm going to have clearance issues with either of them when installing in the case I'm planning on getting (Lian Li PC-A10B). Not exactly sure what would be the next best option. I checked out the Thermalright 128 but it also seems to have it's own set of problems

Any recommendations? Planned main specs...

Lian Li PC-A10B
Asus Maximus Formula
Q6600 CPU
2x2gb RAM
8800 GTS 512mb (waiting on it's release next week to finally buy everything)

 

[BadRobot]

The termal right ultima 90 is supposed to be smaller than the tr u-120 and the tuniq tower with similar results but I'm not sure by how much...

 

[Tpain]

The antec 900.

 

[Quiksilver]

What does the Antec 900, a case, have to do with recommending a heatsink?