I have the A2C's and the Lyr 3. Currently fed by a Bifrost 2, but prior to that a Modi Multibit. The Lyr 3 is an extremely nice pairing with the Aeons (had the original Aeon Closed prior to the 2's). Seems to be adequate power with 9+ watts into the 13 ohm impedance of the A2C's.
I can't say which tubes you'll like best, but my favorites are the Frankentube and the 50's vintage Foton 6N8S. The Frankie (7N7) is a bit mellower than the Foton, but the Foton delivers a boogie factor that is a blast with rock and metal. Lots of other choices too...
Thanks! When it comes to actually buying these things, do you have a site or store that you trust? Or am I just eBaying and hoping for the best?