I just installed my H70 last week with 2 Noctua 140mm fans (on 120mm mounts) in a HAF-X case, pulling air in the case.
I originaly tested in Prime95 at 4.2 GHz @ 1.325V but the temperature was too high: 81-82 'C.
Now I'm running happy at 4.0 GHz @ 1.25V and the temperature is at 71 'C in Prime95.
I'm quite satisfied now. You can check my complete specs below.