Bios Mods -The Best BIOS Update and Modification Source

Hi,

I have a Gigabyte GA-P55-UD3

I believe it is limited to 2tb HDDs and I'd like to get a 3tb into it if possible.

http://www.gigabyte.com.au/products/prod...=3164#bios

I currently am running the BIOS it shipped with in 2009, which is V4. 

The oldest available on the website is V5 ftp://download.gigabyte.ru/bios/motherbo...ud3_f5.exe 

and the newest is V9 ftp://download.gigabyte.ru/bios/motherbo...ud3_f9.exe

Being new to flashing BIOS, I am not sure which would be the best version to mod, since I don't have access to provide the one I am currently using.

Thanks
Chris