Suggestions for integrated amps for B&W CM10

I recently bought the Bowers and Wilkins CM10 speakers, currently paired with Peachtree Audio Nova 125. Although, the clarity and details are phenomenal, I can't help but notice two shortcomings:

1. At times, things get a bit too bright for my taste -- also, I would prefer a bit more warmth
2. It doesn't seem that the Nova has enough authority to drive the bass drivers that well. I just feel that I can get more from these speakers on the lower end without adding a separate sub.

Now, I do realize that the speakers are fairly new with less than 30 hours on them, so maybe things will get better after the break in period. And I also realize that the placement and the room characteristics are not ideal.

But having said that, I would be interested in suggestions for what other integrated amps (or even separates if affordable) go well with the CM10s and provide a bit more warmth and better base. Budget is under$2500, new or used.