Well, I already spent $300 on quality parts when I built up the last bike.

Probably more actually, since I have a generator light setup. It's all in good shape except the frame and the headset, and most of it is probably better than what I'd find on a cheap complete bike.
That said, at $200 the Nashbar single-speed isn't a bad deal even if I throw away the wheels, cranks, BB, bars, and brake levers. ;-)
It looks like the Pake C'mute does take cantis, which is not a complete deal breaker -- but I already have some caliper brakes I can reuse. Otherwise it looks like a nice bike.