Mahesh, yes I think that MCACC would be a significant benefit to you and justifies the extra cost in itself. As to the RS-232C, I wouldn't want to hold my breath waiting for them to release an upgrade to DPLIIx. This happens sometimes on flagship models, but rarely on others.
I happen to be a huge user of USB audio(despite the fact that it isn't the highest sound quality)to listen to classical music from stations all over the world. None of my receivers has a USB input, so I use a Xitel hifi-link to take the computer's USB output through its built-in DAC to feed one of my receivers. Again, not the best sound quality, but the choice of music... If I had a receiver with a USB input, I certainly would have done it that way instead. I understand that sushi does this a bit with his 45TX.
