Just got the Telex 750 single sided for the B717 and dig it so far. Came off a Clarity Aloft which worked awesome in the RJ but overkill for the quiet cockpit of my new bird. Had the Clarity for over a decade and it was on its last leg so I pulled the trigger on the cheaper Telex for now.
Wouldn't hesitate to go back to Clarity down the road if needed though.