Ask your mate what he will be using the machine for, then go from there. 150 quid however is rather high when most decent boards can be had for under £60 at a computer fair.
I purchased a K7S5A motherboard 3 years ago for £25 (new) and still works perfectly today as the main computer. Despite what some dickhead tells you in a shop, you do not need the latest and greatest (expensive) board.
