What preamp & power amp to buy?

Hi Matt, and welcome as a new participant in this forum.
Pls give it a day or so, and you should get more actual responses about gear, from some very knowledgable posters, instead of advice to go elsewhere.

One great amp to consider is a new top-of-the line product just released from Jeff Rowland Design Group, the 625's. They might be an interesting match with the coherence of your incredible Ankaas, and should also be able to successfully drive their lower frequencies.

There's an active thread with Guidocorona, et.al., at:
http://forum.audiogon.com/cgi-bin/fr.pl?aamps&1291695196&read&keyw&zzrowland

Good luck!

A quick search of Virtual Systems on Agon showed systems where Rockport speakers were paired with Boulder (mentioned above) and also Gryphon monoblocks. Might also be worth auditioning or asking Rockport about these.

Good luck, your "problem" is arguably one of the better ones to face!