I would grab the directCU (er heard about from reviews and people here, they seem to swear by it.)
Yup, I'm one of them!
To the OP:
I'm running the TOP version and its brilliant so far! My main issue was the temp's (ambient here is around 43-45 deg celcius, so was a big cause of concern!). Load temp's haven't crossed 75 so far, and that's with many demanding titles. It's been running everything on highest settings and the gameplay is smooth.
My choice: Asus Direct CUII TOP by far!