I walked into a local big box store this evening with the intention of purchasing a Sony STR-DG720. It's a birthday gift for my brother and will be used in his bedroom. It seemed to have an impressive feature set for the money. However, I let the salesman talk me into a Yamaha RX-V463 for just about the same price. I'm still a little confused about the comparative features though. I have the better part of a week before presenting this gift, so exchanging the unopened boxed unit isn't a problem. The Sony boasts 7.1 channels vs. 5.1 for the Yamaha. That's really not an issue, for as long as my sister-in-law shall live, seven speakers in one room will never be a part of my brother's life. Power output comparisons are probably not terribly important either, given the space constaints. Still, I'm a little confused and conflicted about the HDMI audio differences. (One of the Amazon reviewers commented that the Sony has onboard HD decoding, but I haven't seen any other evidence of this). I'm pretty sure my brother will spring for a blu-ray player in the not too distant future, and presumably that player will have on-board DolbyTrue HD decoding. Both the Sony and Yamaha receivers, if I understand correctly, have HDMI inputs for both audio and video. Does that mean the HDMI inputs will simply pass decoded HD audio through?...or will it be necessary to use the component audio connections for this purpose. (Since wires and wives are generally incompatible, a few HDMI connections would be much preferred). Any other thoughts about these two entry level receivers? Thanks in advance.