I've used the 201's and I own the Rowland Synergy IIi (running on Battery) and it's not boomy. If you like the combo, check out your room accoustics.. www.rivesaudio.com (use the room calc to see where your bass modes are) or www.realtraps.com and get some treatment to tighen up the bass. This made a huge improvement in my system and I'm still not done getting all the treatment.
Then after acoustics are addressed, look at cabling and your CDP.
Then after acoustics are addressed, look at cabling and your CDP.