Nice build, what temps you getting?
If your on about mine I'm getting 31 Degrees on both cards it hits about 40-45 under load and Idle at 38-40 degrees on my CPU clocked at 4Ghz. Hits 50-57 Under load.
Not bad to say I was idling at 54 before on air cooling with a coolermaster. v8
I should also loose about 2 or 3 degrees when the new fans are added.