The Lync12 system look like a nice system having the meta data on the keypad, but as mentioned, at an ineradicable price point. I think this is closer the MCA-66 as far as features go.
As far as Power, I have to say I've been happy with it, so much that i bought two, I went with 6 and 8 inch Yamaha Speakers (50 min -140w)
Levels around the house are at about half, even in the master bedroom where the ceilings are vaulted. The master bath also vaulted, I'll cranked it up to 3/4 while showering. (if nobody is home
Even in the outside (although I used two zones in back and one for side) at half volume is loud enough, and I control them via my App (no keypads). My next version I hope to group zones together so if you change source or volume, they will all change. (FYI: I have ported the code to RaspberryPi\Mono Beta for people who don't have a dedicated computer)
Keep in mind, normally it's background music, it's never gonna rock the house like my Theater Surround system, it's not it's intent, but the 14 year old cranks up her dance music in her bedroom and sometimes i wish it had less power.
Bottom line, for the price you really cant beat it, but like always, if your pockets are deep their's always something better....