Looks all good, apart from the case/PSU combo, I wouldn't trust that PSU as far as I could throw it(probably pretty far because it'll be light and cheaply made) Even one of the Foxconn case/PSU combos would be more reliable or the Aywun A1-602, slightly more expensive(by $10) but Aywun at least make alright PSUs
If your client was going to upgrade his graphics card, I'd recommend upgrading to a 520w branded PSU, say a Silverstone, Corsair, Thermaltake, Zalman. At least if you warned him that he'd be best off to upgrade his PSU if he upgrades that, then I think that'd cover all your bases :)
I have moved across the ditch. Now residing in Melbourne as a VOIP/Video Technical Trainer/Engineer.