Bluemike,
Yes, I am a Blue Circle dealer.
If you want to use the Blue Circle CS integrated as a preamp, you need to make sure you order one with the pre-out option (it's a US$75 option). Depending on the size of your room and the volume you like to listen, the BC24 should be fine for driving the Trentes. If you had a large 360+sqft room and liked to really liked to crank it, you might want more power. But I'm guessing that your room is smaller (or you wouldn't have gotten monitors).
FYI, I've never tried using the CS Integrated just as a preamp; have two customers who have bought the CS with pre-outs, but I haven't heard it used this way myself. That said, the CS Preamp is an excellent entry-level high-end preamp...
(I demoed the Trentes for a month using the BC28 (120wpc) as well a ML 383 integrated (100wpc), and both were more than enough for the Trentes).