that looks got but i just did some looking around and saw the asrock z77 pro3, does the tz77b beat the pro 3 for 10USD cheaper?
The Biostar has a lot more features than the Pro3 and the phase design is superior to the Pro3.
Pro3 = 4+1
Biostar = 6 phase
You might have some trouble with Biostar's BIOS, I heard it's a bit difficult to overclock. Asrock's BIOS is better so choose what you really want from a motherboard.