Give your brother advice, if he doesn't take it, let him make his own way. If he's cheap, that's his problem, let him learn by it if he ends up with a crappy drive.
That said, if I were in your place, I'd consider it a golden opportunity to sell my NEC 2500A and buy a 3500A for not much more.
Intel Q9450 @3.2GHz, Gigabyte GA EP45-UD3P, 4 x 2GB G.Skill @4-4-4-12
Antec P160SW case (modded), Xigmatek 750w PSU
3x 500GB (RAID-5), , OptiArc 7200S, ASUS E818A3T
Creative X-Fi XtremeGamer, Hauppauge HVR-1800, Radeon 4890