@purbeast: Audyssey provides room correction. It attempts to provide a smooth, relatively flat frequency response by using a microphone, included with the AVR, to measure the in-room response and compensate electronically (DSP). Pioneer uses MCACC (Multi-Channel Acoustic Calibration Circuit), Yamaha YPAO (Yamaha Parametric Room Acoustic Optimizer), etc. The biggest advantages claimed by Audyssey are more filters (bands of adjustment) and it does EQ the sub while Pionner's MCACC does not (only sets the level and delay). MCACC is user-adjustable out-of-the-box; Audyssey only with more expensive "installer-ready" models and you either pay a dealer to do it, or buy the package if you want to tweak it yourself (about $500 extra).
The Onkyo site lists the TX-NR809 as having XT (not the much more advanced XT32) and does not list subeq (no enahnced subwoofer EQ system); power specs are listed only for 2-channel operation (though 6-ohm specs are listed). Onkyo's rep has been tarnished by a rash of quality-control issues recently. The 809 is in the upper third or so of Onkyo's line while the 37 was essentially at the top of the Pioneer line, thus the 37 likely has more features. I'd get the Pio if just looking at those two, but as chris says it would be worth doing some reading and research into alternatives.
HTH - Don
The Onkyo site lists the TX-NR809 as having XT (not the much more advanced XT32) and does not list subeq (no enahnced subwoofer EQ system); power specs are listed only for 2-channel operation (though 6-ohm specs are listed). Onkyo's rep has been tarnished by a rash of quality-control issues recently. The 809 is in the upper third or so of Onkyo's line while the 37 was essentially at the top of the Pioneer line, thus the 37 likely has more features. I'd get the Pio if just looking at those two, but as chris says it would be worth doing some reading and research into alternatives.
HTH - Don


















