The trios like a big room, but yours might work just fine. Ideally you want to be about 10 feet from the front of the speakers, and you want some space behind your listening position as well. The Classic version with the arched layout requires even further distance to the listener for good integration. You can be closer to the Duo, but then it doesn't sound as good.
As far as your amp goes, it depends on how quiet it is. With the trios you'll easily hear noise you didn't know existed. You will not want to get the new higher sensitivity trio for sure. I have some 80 watt amps that work very nicely with it but I get plenty volume from 3.5 watt amps too. I had to replace my preamp with a passive unit to get rid of hiss...I didn't need a preamp with gain anymore.
As far as your amp goes, it depends on how quiet it is. With the trios you'll easily hear noise you didn't know existed. You will not want to get the new higher sensitivity trio for sure. I have some 80 watt amps that work very nicely with it but I get plenty volume from 3.5 watt amps too. I had to replace my preamp with a passive unit to get rid of hiss...I didn't need a preamp with gain anymore.