I picked up a Class D Audio SDS-470c from a fellow Agon member just for fun and added it in my showroom. Paired with my Legacy Focus SE's it outclassed an extremely powerful Class AB amp in dynamics and extension. While not the last word in detail and transparency, it is the first Class D amp that had enough warmth and musicality for me to enjoy for extended periods of time. I actually love it. Arguably the best amp you can buy under $1k.
Class-D recommendation
Looking for a class-D recommendation for the base portion of a multi-amp system w/ active xover. The amp will be powering a pair of 15" 4Ohm woofers from 30 - 600Hz. Need at least 400W, very high damping, and clean into the midrange. Everything above 600Hz is taken care of by a class-A amp. I would prefer to spend <$2k used.