Need to deaden the noise on these 5870s and after recently installing the Gigabyte gtx460 in the HTPC, I realised how quiet modern GPU cooling can be!!

Digging around, the Accelero is the unit everyone is talking about, it's cool and its quiet......but it's a 3-slot solution and I don't have the room to install them

What are the best choices for 2-slot solutions? Water is out of the question, I had WCed GPUs before and it's just too much of a chore every time you want to fiddle with the pc.