Thinking of a birthday present of a new head. Have been using mainly Genz Benz Shuttlemax, or GK MB500, very happily over last ten years or so, backed up by Markbass 121P or Phil Jones D400 for smaller gigs, rehearsal/home practice etc. I use Vanderkley, Barefaced Super 12T cab, or Phil Jones C8 cabs, all of which I am very happy with.  Clean, transparent, uncoloured. My main parameters are lightweight Class D,  700W plus, (operating down to 2 ohms would be nice but not essential)