I don't see the point he won't use half the power of the PC, it will be worth 1/10th as much in 6 months time and be outperformed by mid-range hardware in considerably less than 2 years.
Theres absolutely no point buying the biggest and best hardware any more, either buy something that matches your needs or the stuff that one step below as you generally pay closer to half the price and won't notice the performance difference.
+1