I've had a Nova since August, replacing the economical KingRex preamp and testing against my Channel Islands VDA-2 DAC and RWA 30.2 and Wyred SX-500 monoblocks on the amp side.
I needed more power than the 30.2 could provide for my Tyler Acoustics speakers. The Nova amp was a great improvement in its ability to handle those drivers. However, the amp wasn't in the same league as the Wyred mono's.
I also still prefer the Channel Islands DAC to the Nova DAC. Nova has more air and space, but less overall resolution and "texture" to instruments. I made this full realization playing Barfly and Three More Days (tracks 3 & 4) of Ray Lamontagne's Till the Sun Turns Black album. The guitar, tom toms and bass drums just had much fuller textures to them with the CI DAC. I think a little better PRAT, or musicality, or wholeness, or whatever the right term is for that rhythm stuff that involves you and taps your feet.
I'm currently using the Nova as preamp/selection and DAC for movies from my DVD player, CI DAC for critical listening from my computer source rig to one of the Aux inputs on the Nova.
Just thought I'd give a little perspective compared to some other units. I agree the Nova is good for the money if you use many of its capacities. Since I'm really only using it for preamp duties, I'm kind of shopping around. It's good as a preamp, and very nice in terms of convenience of switching, tube on/off, volume control, aesthetics, etc., but I'm looking toward one of the new high quality DAC's and a really good quality preamp separate to go to the next level. Maybe a battery powered Dodd buffer preamp and a Tranquility. What do you guys think?
If I do move up, I don't think I'll sell the Nova unless absolutely financially necessary. It will make a great second system/room all in one device.
Just my two cents,
Ben