Well Shakey after 4 months now with VTLs latest ST150,the one with the nice silver face with those beautiful KT88's behind glass.I have to say I really prefer my old Nuforce V3 SE mono blocks.There is no comparison in the bass.Ref 9s smoke the VTL in this region in every way texture depth and tight.The VTL is sweet in the mid-range and although pleasant I don't think I prefer it over the clarity of the Nuforce.The soundstage is more open also with These particular Class D amps.Now I am pleased with the VTL,but I would like to slip on some Nuforce 18s next and never look back.