My amp is a Nad and they're very easy going with speakers really. The problem was that the CA speakers didn't give a sound that felt natural, it always felt digital even though my amp is analogue, as if there was something being left out from the music. I side-graded from a pair of Mordaunt-Short 914i as I wanted a slimmer and sleeker looking speaker to better match my setup's looks hence the Cambridge pair and they were priced very nicely at the time too (although not as low as what you got them!).
Returned them within the safe period to Richer Sounds and paid extra for a pair of Tannoy which were exactly what my ears have been listening for and the want for slimmer speakers has been on long term hold since