I went the other way - from a Cary CAD-805AE SET to the CAD-211AE push-pull amps. The reason for the switch was because the SET was underpowered for my new speakers. With the old speakers (ProAc D38's) the SET sounded magnificent with certain types of music - vocals, lieder, violin solos, string quartets. But the SET's could sound muddled when given something a bit more full range, like heavy orchestral. The symptoms were poor seperation of any instrument from the midbass down.
The CAD-211AE is an improvement in almost every aspect, mostly with dynamics, midrange weight, and almost unstoppable drive. But the top end is nowhere near as good as the SET. I was bi-amping for a while (see my sig) before I was forced to return the SET to pay the bills! If I could afford it, I would buy another pair of CAD-805's and bi-amp again.
The CAD-211AE is an improvement in almost every aspect, mostly with dynamics, midrange weight, and almost unstoppable drive. But the top end is nowhere near as good as the SET. I was bi-amping for a while (see my sig) before I was forced to return the SET to pay the bills! If I could afford it, I would buy another pair of CAD-805's and bi-amp again.