SE5 with RWAK240 is my go to rig. Ver balanced sound. SE5 can be even better with more power, like with the 901, but you lose a bit in clarity. DX100 migbt have been the ideal mix.The NT6 does not work well with RWAK240...too bright and thin. It is perfect with the 901. The Ref1 is perfect with RWAK240, the Kaede works with both AK and 901, the Roxanne with RWAK240, a bit too muffled with 901.