I havent' listened to those in particular, but I've listened to plenty of Yamaha gear, high end and low end, and they haven't appealed to me musically. I feel that they tend to lean toward a flatter sound that may be musical to some, but not to me. The receivers are great for HT, and in fact, I find that their lower cost receivers are actually quite good for the money. For music, I am listening for something that gives me a little more though.
Rotel, Arcam, Musical Fidelity, B&K, are all a cut above. Marantz, H/K, Cambridge, NAD are all affordable yet musical to me.