Yeah, I have dismissed these cheap sealed units as a bit of a gimmick and will either keep my Titan Fenrir or get a huge slab of metal installed such as the Noctua or Silver Arrow.
I would recommend the Antec Kuhler series over the Corsiar ones now, my 920 is on push/pull (it comes supplied with 2 fans) on a 1366 i7 930 @ 4GHz with idle temps of 40 degrees Celsius and under load (P95) never got over 55 degrees.
Stoner81.