No3. I dont know the price of those motherboards but it might be worth having a look at the DFI SLI-DR motherboard.
No3. atm AMD dost not support DD2, so i would go for you second
option. also, 2x1GB chips will be better then 4x512MB
No8. What brand is that monitor?
No9. I have a DRU800A sony burner, great.. especially the nero bunle.. but i really dont see the point of 2 burners? maby 1 burner and 1 normal DVD driver.. but when will u be burning 2 DVDs at the same time?
No11. Im sure people will recommend a heatsink, or if u have money water cooling. But i am going to suggest the heatsink i have Gigabyte G-Power Pro, great heatsink with a fan you can bearly hear.