Hi Kansas,
I pair my PSB Imagine T2's with a Parasound A21 amp. IMO, the T2's needed some juice and found the bass had a nice punch with this amp. I also use the Audio Research SP17 preamp with that amp and found it didn't colour the sound. The T2's still had a nice rich midrange and the preamp added some detail and air that I feel the T2's lacked. I also felt the tweeter in the T2's were a little sibilant and feel the preamp softened the screech a bit. I am in a treated room which also took a little sibilance away from the tweeters.
I pair my PSB Imagine T2's with a Parasound A21 amp. IMO, the T2's needed some juice and found the bass had a nice punch with this amp. I also use the Audio Research SP17 preamp with that amp and found it didn't colour the sound. The T2's still had a nice rich midrange and the preamp added some detail and air that I feel the T2's lacked. I also felt the tweeter in the T2's were a little sibilant and feel the preamp softened the screech a bit. I am in a treated room which also took a little sibilance away from the tweeters.