I've owned quite a few including the Alembic F-1X, Kern IP-777, Millennia TD-1, Demeter HBP-1 & VTBP-201s, Aguilar DB 680 and Epifani Quest II and my favorite is the Demeter VTBP-201s for its simplicity and purity. I toured with it for a short time but I mainly used it in the studio and it always gave me the sound I liked - warm and round but precise. The Millennia stuff is also killer but very pricey. The DB 680 was lush and warm but felt a little sluggish and rounded off at times. I also like the SWR Baby Blue II preamp section. I used that for many recordings before I got the Demeter.