I finally picked up an Evolver recently and love it. It had been on my wish list for nearly 10 years. I initially wanted it for its analog VCOs, but what brought it back to the top of my list was its digital ones. That and the fact that after a long run, it’s going out of production as DSI is focusing more on the Prophet line these days.
The final things that pushed me into “alright, I should really buy it now” are its effects (the harsh noise side of me loves its distortion) and a broad bank of modulation options (24 sources, 75 destinations; only the Pro 2 and Prophet-12 have more). It’s a really unique little beast and I don’t know anything in its price range like it.
I was able to do a lot, from some simple synth sounds to pulsating harsh noise chaos, pretty immediately. But what’s really helping me to appreciate it is an in-depth PDF guide available from here (under “Definitive Guide”): http://www.carbon111.com/evolver.html