I would take a look at the Blue Circle forum. There are plenty of comments that have been posted on this pre.
I had the opportunity to spend some time with the 3000 MKII GZpz and it is a wonderful pre. Has lots of speed, detail and clarity but never in an analytical way. It throws a very wide and deep soundstage and images are nicely fleshed out. If texture and inner detail is your thing, then you will really enjoy this pre. Like all of Gilbert's designs, it injects a human quality that makes his products so special. It easily bettered my soon to be replaced EMM DCC2.
Another product you may want to consider is his new BC109 which is fully solid state and powered by a huge bank of capacitors (aka "Pinkie").
