Well without going all Intel fanboy on you ;-), the big thing that jumps out in terms of raw compatibility is that you have a 6gig tri-channel ram kit listed, when your board only supports dual-channel. This isn't to say you cant run 6gigs, but it will be downgraded to single channel automatically by your motherboard. You're going to want to go with a dual-channel kit (2 or 4 sticks) for your motherboard. FYI "kits" don't determine the channel support, the mobo does, so when you see dual or triple channel kits, all that means is they're packaging the correct amount of sticks together.
Also keep in mind that your mobo's PCIe16 slots only operate in x16,x4 speed, and SLI requires x16,x8 at a minimum. You will be able to Crossfire though.
If he wants to unlock the other two cores, let him. Not everyone wants Intel..... Also i would recommend a better quality PSU. Thermal take is ok to get by but i would go with a Corsair 650 is enough for what your doing. Also that video card isn't on the best of things. I recommend XFX if you want a 6850. for a little more you can get a GTX 560 or 560 ti and both are a little better