Ah, the Merlin. Nice, but I think way too overpriced.
My favorite airflow setup is one rear exhaust, one top exhaust, one front intake, and one side intake. They don't need to be super performance fans. Sleeve bearings with 30-50 cfm that are less than 30db at full speed. 120mm, not 80mm. Just needs a constant movement of air, not super-fast like a radiator would need.
If you're buying a high-end video card, find one with cooling that has more than one exit point for exhaust. So, pretty much any non-reference PCB card. The reference designs with the stock cooler focus on rear exhaust which actually creates more air restriction.
Another virtually silent cooling solution would be a Corsair H80 on your CPU in a push/pull configuration out the back of your case, with one additional intake and one additional exhaust using quiet 120mm fans. It will cut down on the noise of a stock CPU cooler, that's for sure. Video card's a different story. All depends on the cooler mounted on it.
This post was edited on 11/26 at 1:59 pm