Being a Maggie with a readily accessable x-over, you have the option to actively bi-amp. Magnepan will even help you if you talk nice to them. Get a Marchand deluxe electronic 2-way x-over (~$400 US) with the frequency module Magnepan recommends (probably in the 300-500 hz range). Then bypass the 1.6's internal x-over so that the amps are hooked directly to the "ribbons". You can now pick you amps. Solid state I can highly recommend (2)Forte 4's for about $500-600 each, very smooth and can readily control the bass panel. A single Citation 7.1, 4 channel amp is also a good pick at ~$800. Just as smooth as the Forte but a little less open. For tubes,(2) Rogue 60's would be great but a little on the high side price wise. Whatever amps you choose, my experience is to keep the amps the same.
Another option is to get a good sub with a GOOD built in electronic x-over (like a Velodyne FSR-12..$500). This will increase system extension, tighten the bass and relieve the Maggie's bass panel and the main amp of significant bass duties. This can really open up your system and make those current starved tube amps sing.
Another option is to get a good sub with a GOOD built in electronic x-over (like a Velodyne FSR-12..$500). This will increase system extension, tighten the bass and relieve the Maggie's bass panel and the main amp of significant bass duties. This can really open up your system and make those current starved tube amps sing.