[cma29]

Hi, Tim.

Yes, the 20.7 reproduce instrumental timbers really well including tympani (and especially brass).

Based on what you are saying, the 20.7s may be the speakers for you. I'm not familiar with the Sunfire amp, but based on the power doubling into 4 ohms they should be good with 20.7s. That's the key. The 20.7s need a beefy power supply that can deliver current. My amps are only rated at 100 W into 8 ohms (200 W into 4 ohms) and they make the 20.7s sing and get plenty loud.

I had the 3.7s for about 8 months so I knew I wanted the 20.7s and my dealer offered me 100% trade-in credit. I did not investigate other speakers.

By the way, there is an updated 3.7 model available, the 3.7i which was reviewed in the Nov 2014 issue of The Absolute Sound. Check out the other thread here on that. That speaker, along with some Maggie bass panels, may be the ticket for you. Where do you live?