Ok, I have some questions. First of all, here is my current system:

Opterown 148 CABNE
Asus A8N-SLI Premy
2GB OCZ Plat. 2-3-2-5 DDR400
2x74GB Raptors
Audigy ZS 2
PC P&C 510 SLI

I'm having trouble with good overclocks on the Opty and I have a few options. First, I ordered some Ballistix Z503's to replace the OCZ as I need a higher HTT/FSB with this chip than the FX-57 I had before it.

Second, I'm thinking about removing the IHS for better temps and possibly better overclocks with lower temps/volts. This is not definite as I don't want to kill my precious CABNE, but I might do it tonight if I find my balls

Third, and the main point to this thread, is should I switch to the DFI SLI-DR from my A8N-SLI Premy?

I've heard nothing but good things about the board when it comes to overclocking and need the options it can provide, but I have a few questions about it before I go ahead and order.

1. Will my 7800GTX's with 80MM fan mods on them fit on the DFI board. There's between 7/8 and 1 1/8" between them in the Asus and I don't want to have to reverse the mod if I get the DFI.

2. Will I have to totally reformat and reinstall Windows if I switch motherboards? I don't know a lot about that sort of thing and know it'd be best to, but is it required?

3. Is there anything I would need to know about in switching from my current rig to the DFI board that would be issues?

4. What is the difference between the UT and non-UT SLI-DR and why is the non more expensive?

Any help on any of this would be greatly appreciated.