And? How would you compare the sound?
I'm comparing one of Onkyo's top-line receivers (TX-NR3008, retailing for $2100) to an $800 tube amp that has been rebuilt on a Baldwin organ chassis (with 4x new Electro-Harmonix 6CA7 power tubes, and old-production 2x 12AU7, 1x 6SN7, and 2x 5U4GB driver / rectifier tubes). The tube amp at least matches the performance of the Onkyo, but it's not a "night & day" difference. Rolling in better power and driver tubes will change things somewhat, of course.