Bryston 7B SST2 + Aesthetix Calypso ???

I own a pair of PMC IB2i's (currently for sale due to new purchase of ATC Actives) and an Aesthetix Signature Calypso paired with a McIntosh MC352. The MC has an input impedance of 20k ohms SE, 40k ohms balanced. The Calypso sounds beautiful with this combination, preferred over my McIntosh C2300 preamp. I think the Aesthetix/Bryston combo would be fine in terms of impedance matching. On another note, the Calypso doesn't seem to be a good match for my new ATC actives which have an input impedance of 10k ohms which is the "minimum" Aesthetix recommended amp load. Experiencing some bass rolloff with this combination.

I purchased the 50ASL's. My first impression is that the ATC's are a very detailed, accurate speaker. Active speakers simply have some advantages, one being the grip that the dedicated amplifiers have on each driver. I can hear deeper into the recording versus the IB2i. The IB2i's however have a bigger soundstage, deeper bass and overall presence. The ATC seems to be more forward in the midrange. They are so different yet I really think they are both fantastic speakers, makes it hard to decide, pick a favorite...maybe keep both. I have found the Calypso Signature to be a good match with the PMC's. I have been using a Mac c2300 which is superb as well, but the Calypso really makes the mids come to life, more "tube life" if you will.