I feel your pain on a wait period. I've just yesterday received my BP-19. I'd been on the waitlist for quite a long time for a BR-20, however I realized that since I intended to use my BDP-3 / BDA-3 combo, and have the external BP-2 phono components, I really only needed the analog-only preamp.
I did connect and listen to the BP-19 after receiving it yesterday. Even listening "cold" out of the box, my reaction is that it sounds extremely good with the active T-10 system on a variety of different music genres. It has little to none of the tonally lean presentation of some solid-state equipment, sounding "authentic" with respect to the tonality and body of acoustic instruments and voices, assuming good recordings. The BP-19 seems to combine a relaxed, and relaxing to hear, tonality with rendering of small details that took me a bit by surprise. Older classical recordings minimally miked in real halls seemed to have more of a sense of spatial depth than I've heard recently.
It seems that your wait will be rewarded in the end, if that helps at all.
Brian