If you have a chance to go balanced, then do it. The PB2 in balanced mode will probably stomp all over the BH2 in sound quality, but it's a hell of a lot less portable. Not to say that the BH2 is a bad amp as its great bang for your buck, but going balanced is just better in most every way.
I am selling my two weeks old PB2 if anyone here is interested, I bought it specifically got my DX 50 to push my 650 but I am currently reinvesting back to my desktop set up to suit my budget.
Edited by chee006 - 4/15/14 at 12:18am