There are many differences.. AVR 7200 has 7 amplifiers on board AVR 7200 has Logic 7 7.1 AVR 7200 has an LCD remote control AVR 7200 has triple X-Over system AVR 7200 has DVD audio bass manager AVR 7200 has A Bus AVR 8000 has THX Ultra AVR 8000 has dual DSP processors AVR 8000 can...