If you're going with 1156, you won't need anything more than an i5 750. If going with 1366 then the i7 950 is a great choice.
For motherboards, are you looking for anything special like SLI/Crossfire, USB 3.0, etc...?
For the RAM, i am sure it is good RAM but i see alot of DOA's and malfunctions with the Corsair TW3X4G1333C9 XMS3, the other RAM you have for 1366 is the same, just triple channel. Might want to look into G.Skill Ripjaws or something like that.
I am looking at sli board for a sli gtx 460 next year, usb 3.o and sata 6 seems to be a long way off being main stream and with the i7 860 and the i5 750 are their any games coming out that might utilize hyper-threading?
No games in the near future are going to make use of hyperthreading. Most games today don't make use of more than 2-3 cores. It seems likely that more physical cores are going to be readily available before we see any real gaming use for hyperthreading.
Just out of curiosity, are you seeing problems while gaming right now? The GTX 460 at 1680x1050 should be doing fine.
If you're just upgrading to upgrade, you might consider waiting a few months until SandyBridge & Bulldozer are out.