Check out Audioengine. Might be the perfect fit for you. Small powered bookshelf speakers. $399 for the 5+ model, $199 for the smaller 2 model. Only downside out of the box is the headphone jack input, which you'd have to run from the headphone jack of you MBP. For $169 you can get their D1 USB DAC and run USB to RCAs, bypassing the arguably crappy headphone amplifer in the MBP.
http://audioengineusa.com/
http://audioengineusa.com/