I'm really happy with them. I've been listening to various types of music and watching movies.
For two channel stuff, they throw a big soundstage and image well. I generally leave the sub on but for a lot of music they have enough extension to turn it off.
Surround is pretty seamless. The CC-490 matches the 20s well. The 10s sound pretty similar as well. I probably could have gone with 10s for the front L&R without any noticeable drop off but I really like the 20s.
I would consider these to be audiophile speakers. They do really well with well recorded/mastered material. With bright sounding mixes they could probably get fatiguing. I would characterize them as somewhat analytical. They can also handle a bit of power. I watched AC/DC Live at Donnington with the volume kind of highish. I was measuring peaks around 82-83 dB at my listening position. They sounded great with loud rock 'n' roll. They also did great with Sade, Diana Krall, Paul Simon's Graceland, Bela Fleck's Throw Down Your Heart, Dead Can Dance, Shaman's Harvest and various classical recordings.
Jim