1. I plan to go SLI (or crossfire if a Radeon card is suggested) later when the need comes.
2. Is the motherboard good for SLI/crossfire setup? Will this motherboard last long? Is it overkill for the purpose?
3. I have not decided on RAM yet. I should make sure the motherboard works with the multi-GPU plan first, correct? Is 8 GB enough?
4. Overclockable parts are welcome as well, I might OC a little bit. I think that the CPU can go to at least 3.7 GHz without problems.
Alternative part suggestions are very welcome.
EDIT1: I don't have a real budget, but lower cost is preferred, of course. If the performance increases greatly, I can spare a little extra.
EDIT2: Updating parts as I see fit.
The tall heat sinks will interfere with any aftermarket coolers you want to use. Also make sure that your motherboard can handle the speed - check your vendor's QVL (qualified vendor list) to make sure that it matches the speed and voltage.