I've seen the 5950X more frequently on NewEgg's shuffles...
It doesn't quite hit my sweet spot for single core peek during multicore (you know, Minecraft and other old single player games) system use. The 5900X looks like a good mix of single, multi-core, and value budget.
Which is also the same reason I want a 6800 XT GPU to go with it, 16 GB of videoram to throw at games or just way too damned many tabs being open.