If you plan on getting Blu-Ray, decoding of the new HD formats is a plus. Also, the more HDMI inputs the better (for future expansion).
Power (watts) is over rated and is used too much as a marketing tool. The difference between 90 watts and 120 watts is very small. Don't discount a receiver just because it is "less powerful".
Also, don't rule out companies like Pioneer, Yamaha, and Harmon Kardon just because I like Onkyo. They make excellent products as well. Just avoid store brands, low end Sony's, and ANYTHING from BOSE.
It is really hard to get a bad receiver at this price point if you stick with the brands mentioned here. Have fun shopping
