I'm not sure if you'll do better than that 1000AMG Plusview. The key to an extreme gaming rig that is OC'd is ventilation. With some modification, you could probably alter that Antec to fit your needs. If you want good looks, expandability, and lotsa ventilation, I'd check out one of the Lian-Li PC75's from
PCMods. They'll laser cut up to 3 80mm fan holes into the window as well. There might be some other sites that will do similar modifications for you; With a case that big, you may want to consolidate the number of fans and look at 92mm and 120mm solutions. You'll also definitely want to look into a rheobus or fan control solution, as that will give you total control over fan speed/noise/cooling. You might also take a look at the Thermaltake Xaser III's. They incorporate much of what I've mentioned into a stock package, but the cases themselves are modified versions of the case you own.
Chiz