yup Gigabyte all the way ... i've had several types of board over the years and Giga seem'd to be the only guys out there who really know what they're doing.
Though if you can afford it with an AMD processor either get AMD's 768 board or nVidia's nPower2 board
Asus have alot of faults on them, biggest one being that any processor that you put on there can't actually be detected properly by anything other than the OS - so all that extra power from those fancy updates you can forget about cause quite simply programs will think you have a standard x86 mmx processor
Anata aru kowagaru no watashi!