This might not be of help to you, but I currently own a BAT VK-20 preamp. It is one of their solid-state models. I used to have a Krell KRC-3, but found that the BAT offer a deeper soundstage and seemed a little more transparent. I have heard that the tube preamps from BAT are some of the best on the market. You have made a wise choice on deciding to buy a BAT preamp, sorry I could not be of much help in advising you which model. I know that on any of their solid-state models you can get an inboard phono stage.
Which BAT preamp?
I got enough advice from a fair number of Audiogoners, and I'm getting ready to buy a BAT pre-amp, hopefully used or demo at an attractive price. Sold one of my amps, put my AR SP14, Audio Refinement Complete integrated, Townshend Seismic Sink, and Hitachi tuner up for sale here on Audiogon. That should raise enough cash to get a BAT preamp. I went to BAT's website, had a little trouble figuring out which model(s) I should be looking for. I want a tubed preamp, with a phono section, and perhaps a remote control. Not sure which models fit the bill, and what they'll likely cost me. Any inputs would be much appreciated, thanks for taking the time. Jeff