Who makes great active preamps ? Tube or solid state or hybrid.

First Sound, Joule Electra (out of business so only available used obviously). 

Got to add, dollar for $. Klaus’ Candela is far better than it ought to be at 1600.00.  I’ve not heard anything at that price point that can compete.  
Tube access notwithstanding. 

@richdirector 
>> "Valve input MOSFET out"

All tube in signal path. The MOSFETS are constany current sources for the line stage/buffer.

Halgorythme made by a French music lover:
http://www.halgorythme.com/preamplificateur_ligne_cv1816sn7.html
http://www.halgorythme.com/index.html

Obviously, some brands are mentioned more frequently because that company produces a lot of units.  That having been said, of the brands I've owned, Audio Research is one the best I personally have heard.  When the ARC Reference 3 line-stage entered my system, my (audio) world changed.  All the music I thought I knew (and I was already using a more affordable ARC line stage), had to be listened to again.  In all the years it's been in my system, I've never had the urge to "upgrade."  The complete satisfaction continues.......