Well, all that I see mentioned earlier looks a bit old. Prolimatech did some nice work lately and you can get some of it on newegg too. They are ofcourse a bit more expensive, but if you are benching this is as far as you can get it on air.
Prolimatech Megahalem rev. B link
You also need some good fans on it, since it come without. If you are going high performance you can equip two Silverstone FM121-B in push/pull configuration that can be manually adjusted from 800rpm (quiet) to 2400rpm(noisy) and push real hard. link
The manual adjustment makes it good for both benching, gaming and can make it quiet when you need the machine to be quiet.
Your choise of chassis is close to perfect really, and especially for that cooler, because it needs to be fueled with loads of cold air being pushed in to it and the front of that lian-li will provide that.
But more modern chassis are arriving now, and these are turning things up-side down. Actually just up. All cards are turning upside now, not outside that back of the computer. You can see Silverstone Raven chassis, and Timjin too. More chassis are coming like that, because the heat transfers are far better that way. link
Heat is going up, and these Raven chassis are just pumping air from the ground up, so the nature is helping to let the hot air out in a more natural way than old-fashion/normal chassis does.
A bit more on the configuration here, just with an old i7-920 and the old revision of the cooler, not Rev. B which is improved. LinkEdited by qwwwizx - 10/3/11 at 1:52pm