This will probably be the last rig I build for a while. I just can't keep spending on hardware like I have been in the last two years. 2x P55 rigs, 2x X58's, 2x Z68 rigs, 1 Z77, 1 SR-2, 1 Quad Opteron. Ouch. $$

$$
Anyways, I plan to use this rig for folding, a bit of gaming, and an XBMC box.
Case will probably be a Silverstone SG09. I don't have room for a large case.
Motherboard will be one of the following: ASUS X79 RIV Gene or MSI X79MA GD-45 (If I can find one)
I want to go SFF so mATX is what I am looking for. I have an ASUS P9X79 Deluxe coming from RMA soon so I can test this CPU and will probably sell the board afterwards.
CPU: Early stepping (B0) E5-2660 xeon @ 2.3GHz (Turbo 2.5GHz) 8 Core/16 Thread
ASUS GTX 660Ti DirectCuII
4x4GB Mushkin Blackline Frostbyte DDR3-1600, 9-9-9-24
128 GB OCZ Vertex 3 (Probably dual boot WIn 7/Ubuntu 12.10
Coolermaster TP-812 Cooler
850W Enermax Platimax (overkill? oh yes!

)
Most files will be stored on NAS so I don't need much local storage. Just enough for a few games on the windows partition.
Parts I have already: