I think I am finally going to take the plunge and build a desktop pc besides its a good excuse to tinker!

How do you pro's do it? Pick a motherboard that will do what you want (32 or 64 bit, sata, raid, lan, OS, etc) and build from there?

My second question is how much percentage wise of your budget do you spend on the motherboard versus the other components? The boards I am currently looking at run form $95 to $250.

I think I would like to build off of a ASUS board with a Athlon 64 X2 / Athlon 64 FX / Athlon 64. I was given an Athlon XP and I am really impressed so far.