Currently have both the 51se and arc ref 3. The treble is closed in but it really opens up with the right power cord. I found Synergistic AC coupler or harmonix xdc or ESP essence really trim the fat at the bass and open up the treble. It has great bass and macrodynamics. Lots of features. It also sounds very fluid and direct.
It is a steal on the used market right now.
It is a steal on the used market right now.