Considering the TX750 is 89.99 after MIR on surprise special, I don't think there is a much better choice. And if he says he doesn't like MIR, tell him its a 2-4 month process, so if he buys the PSU now, he gets the MIR a month after he finished his rig
Otherwise, if he is willing the change the case, I find this deal to be quite good.
Antec P183 and CP-850 It gives him a better PSU and a kickass case

Otherwise, if there is a good deal on a 650W PSU.
For now, I am quite unsure if u can get an HD4890 for 150, but if he is willing to go for used stuff, then the 2-4 month process could really be put to use and he could save quite a bit.