Depends on what he is looking for, but for a pretty good all rounder,
I've just bought a Samsung R20. I paid £499, but that was a sale price, it's usually about £599.
Mine is: Intel Core2duo 1.73 Conroe, 2gb ram, 120gb hd, ATi Xpress1250 256mb, DVD/RW, 14" screen, windows vista home premium.
I'm really impressed with it, and it came highly recommended by... the one high street store i trust, the one that is famous for best customer services, and is never knowingly undersold. It came with a 2yr warranty. Which to me was an unadulterated bargain.
Looking at lappies on sale, that's about the best option i'd say