I have tried to get my thread stickied on the Blizzard forums without any success. It has a lot of tips to improve performance in the game. In my case, the ramdisk trick made a huge difference on stuttering. I even went back to HDD install to make sure I wasn't imagining things and the 1-2 second constant stuttering came back. With it on a ramdisk it's more of a microstutter and a lot less annoying.