I am about to audition some of the preamps stated here but I gotta say that when I added the Tom Evans Vibe SS preamp into my system, Whoa! It blew away the Pass X-1 I was using with my Pass X-250 amp. Blew away the Blue Circle G-3 MKII. It does not have the tube mids as the BC which BTW I love but it added width of soundstage, most natural and detailed sonics that my Pass X-250 has ever produced (I was even thinking about selling the Pass recently), separation of notes and vocals like nothing I ever heard before. Yeah you loose the softer tube sound but the Vibe is not SS sounding just natural, and most people feel the Pass X-1 is natural sounding, well not like this at all. The Vibe is almost like a passive preamp with some gain. I wish I could get my hands on a First Sound to compare but no dealer I have contacted will let me audition one yet. The Hovland is very very nice but does lack some of the lower bass extension and if you look up my thread as to why Hovland owners sold their units, it was do to hum. I have no first hand experience though. Next on my list is Joule Electra, Lamm, and CJ.
Happy Listening.
Happy Listening.