I second the VTA/Tubes4hifi amps. Currently running twin M-125 monoblocks and their SP-14 preamp. I built the amp kits and had them build the preamp while I was in the process. Very rewarding listening to something you had a hand in bringing to life, but don't kid yourself, these are solid, powerful and musical regardless of who built them. I'm extremely satisfied with the investment, getting ~125 watts of tube power from each of these is awesome.
