please tell me you didn't sell all that for $700, and don't get the Rampage Xtreme... please don't.
the Rampage extreme isn't that great for i7, I know you had there stuff on last build, but they aren't that great. they are ok, but there is much better options in the i7 market..
I'd say you should do this. get what the man above said and do the P6T Deluxe, it's one of the best boards you can get, or get a Bloodrage, or my other suggestion would be get the eVGA x58 it's a great board. (or if you have the cash, and you DO. I'd get the eVGA Classified. look it up. it will be the first motherboard ever to enable TRIPLE SLI. and you still be able to run a physx card, and a sound card. no boards that run triple SLI now have room for a sound card, and for sure not 4 cards.. so the classified you can run triple sli, a fourth physx card, and a sound card. It's simply amazing.
I'd return the Rampage and get one of the above mentioned. and the i7 920 is a great chip. it will hit 3.8 Ghz or 4.0 Ghz decently easy. I will warn you. your temps will go over 60c with that. i7 currently runs Hot. (I'd wait for the new stepping release of i7, should be here very soon. they have a new revision of there current 920, and 940 and it's called D0 stepping. they run Much, Much cooler, and overclock better. and this is Guarantee'd Check this out.
Core i7 920 rev D0 stepping 5 
- XtremeSystems Forums
They were supposed to be released on March 2nd. but were not sure. the sSpec on the box will either read one of these 2 codes.
C0 - SLBCH
D0 - SLBEJ
D0 is the newer, better revision. Just some FYI for you.
I'm sure you'll be happy either way, but I'd rather have the D0, it's what G0 did for the B3 Q6600's if you remember that.. plus your 920 clock for clock will KILL the old QX9770. so you'll be fine running at 4.0 Ghz or so.. but the D0 will do it with less heat.
Also the 6GB of RAM is more than enough, that will do you perfect, no need to get 12GB IMO. oh and if you can, get the new Red Corsair Dominators that are 2000...
As far as selling those parts. you should still be able to get around $600+ for that Q9770, and your current Motherboard is the x48 is around $300 new, or abour 200 used. Not to mention that your ram is 50 for each 4GB set. you should be asking more like $900 for it.
Good Luck man! did you sell it yet. i might get a buyer for ya.
. So we are now on the onboard graphics for a spell. Other than that it's a sweet runner with Vista Home Premium SP1 x64 and currently with G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) @5-5-5-15-2t :D 
