I dont have any experince with Biostar motherboards, I cant tell you that much, but A-Bit makes excllent motherboards!
I have an asus with a screwy bios where everytime we have to restart this thing the bios dies and needs a reset every single time! I can also dont really care for XFX's motherboards ether. (dang I type that word alot!
Id sday the best is Abit, If biostar don't work out for you!
foxxconn motherboards are the worst, I was a buolder at dell, so was my fiancee and he literally had 3 go smoky on him. smoke everywhere! bad mobos!
also when I put in a stick of RAM into a few they cracked! literally!
and ATi radeon cards are very stable! good choice! 9800 pro and up are good.