Another vote for the Edge Juice/Attitude combo, I love mine.
Its a great starter box, has "guages", it will defuel if EGTs are high, and also does boost fooling.
For the exhaust, if hes on the cheap, id just hack off the stock muffler, and weld in a peice of 4" pipe(you can also hack off the cat as well)
Its not too loud if you leave the cat, and just slightly louder if its just straight 4" pipe.
If not, he can get a cheap 5" straight system($320~), and weld in a donaldson muffler.($150?)