I've been using power scaled amps for a few years now. Currently using a Stephenson custom LJ15 head (with a new 30 watt combo on order). I had a couple of London Power studio amps in the past and they were excellent amps too.
Lot's of builders around offering power scaling now (i.e. London Power, Stephenson, Soultone, Reeves, Suhr, Corybuilt, Kingsley, etc...)