ARC REF 2 MK 2.....Great bang for the buck. Generally around 3 to 3500 used, depending on condition. I actually prefer the REF 2 MK 2 to both the Ref 3 and 6 SE I had. Of course the 6 SE is overall the better device, however in one vital area I do like the REF 2 more....Tonality and Tonal Density. The 6 SE is just a touch drier and leaner in the mid bass and mid range. YMMV, as they say.
Cheers...