I have never owned the Aerius speakers, but I can still confidently recommend a Bryston B60 integrated amp. This was the amp I owned (and really loved) prior to getting my present Plinius 8200 mkII. I recommend it for two reasons:
First, the midrange is gorgeous. Absolutely heavenly with female vocals and very sweet sounding with acoustic music. It literally put a smile on my face many late nights. In my experience it just lacked punch, but your stated listening preferences suggest that this will not be a factor for you.
Second, I recall that the Stereophile reviewer (Sam Tellig?) for the B60 purchased them to mate with his ML Aerius speakers. I take this to mean they would be a good match for this amp. He liked the combination for choral music. Again, the glorious midrange.
The B60 needs a replacement jumper cable (~$30), but you can still get it used for a few hundred less than a used Creek (which I haven't heard). I'd guess in the $700-800 range. Add to that 10+ years of trouble free warrantee and it is very worth a listen. (Also, the B60 is 100 watts into a 4 ohm load; 60 watts into an 8 ohm load.)
Good luck!