You should not be concerned with messing around with the BIOS.
That is something that should only be hampered with if you have problems.
This system I am using scores 5.9 on all components except the processor which scores 5.5 (nothing is overclocked)
ASUS P5Q SE
4GB Corsair Dominator DDR2-8500
BFG GeForce 9800GTX 512MB OCX
Seagate 500GB 7200.11
Seeing as everthing you are looking at is a generation ahead of what I am using, methinks you won't have to worry about scoring less then 5.9