I'm Gigabyte fan always but my last board is MSI P35 Platinum which I got in some computer parts exchange with friend... bla bla nvm. But everything I can say is that this board rock!! I didn't dream that this board will work on all default voltages at 500MHz FSB, 1000 MHZ mem (1066 Kingmax which rock! for 30 euro 1GB piece 2x) and cpu Dual core 6750 at 3500 MHz, I know its not too high but all is on default voltage and working extra stable and fast for me.
On default voltage I try to push board to 515 FSB stable, at 520 FSB wont work stable at default voltage but 500 is nice for me.
My memory is Kingmax 1066 (KKA8FFIXF) which work even on 4-5-4-15 at 1.9v and I got 9705 MB/sec memory read in Everest which is quite impressive for memory at 1.9v of 30euro price per module.
I didn't try Gygabyte model you want tu buy but I got 2 others at my home P35-DQ6 and X38-DQ6 which my brother use and both of boards can't hit 470 fsb stable

or without switching voltages in bios to max and get stable 470, I can say only that both boards are 1.0rev, may be that's why they don't work more than 470 MHz FSB easy. I read on forums everywhere 1.1 board rev. work rock stable at 520 easy so be careful before you buy (I think 1.0rev are always been avanturistic in most cases)
Btw. MSI P35 Platinum which I have is also 1.1v and I read on few forums also that 1.0 wont hit more than 470MHz FSB so be careful here also when you choose board. And for some low amount of money you can have nice PC.