If you have a chance; skip 515 and try to get 616 for a couples of bucks more. If not then get tne 1022 in which has manual eq besides mcacc. Onkyo 515 does not has manual eq. It has just audessey 2eq but 616 has audessey 2eq plus manual eq for speakers and 4 additional eq bands for sub, has 20w more per channel, 3 stage inverted amps and thx. There was a nice deal on 616 for $344. Also 616 has better zone management than 515.
Onkyo 515 has power; can moves my Polks RtiA7 prettty well, and I consider that audio is better than previous onkyos of similar prices. Pandora audio is pretty awesome. 515 is pretty nice, but if you want to Equalize then get 616 or 1022.