which amp for bedroom system with harbeth 7es-3 XD

I have enjoyed my Art Audio18W set amp in my bedroom for a long time but recently got the Harbeth 7es-3 XD and while excellent sonically do think a little more juice might be better still.  

This is for a bedroom system so dont want to spend big bucks so primarily considering the Rogue stereo 100 or the Benchmark AHB2.  I have the benchmark la4 and benchmark dac so leaning towards going all benchmark.  I can say that with my ZMF verite closed headphones I am quite happy with the dac and heaphone amp on the preamplifier.  So I am not considering an integrated amplifier nor a tube preamp.

I hesitate with the AHB2 only in that dont need nor would get subterranean bass with the Harbeth in bedroom so perhaps the Rogue would sound better in the midrange.  I do like Herb Reichert reviews and he suprisingly preferred the rogue in ultralinear mode with the smaller still Harbeth 30.2.  I listed to all types of music but want a vocals champ and certainly dont want an amplifier that is forward sounding (although that is hard to do with Harbeth).

thanks

Michael