I used to own the Ultragain 2200. Sometimes it was fine, but other times it introduced a wierd harmonic sound, and also at times it would badly hum.
I was tempted to get a Behringer 1953 preamp, but now I use a pair of Studio Projects VTB1's that I'm very happy with. They're extremely quiet, offer the option of dialing in a tube circuit, and I find them very neutral.