The old GP12 400 SMX (think that is the model name) was absolutely fantastic.
All I wanted Trace to do was to make a smaller lighter version. it didn't have to be absolutely tiny or weigh less than your average book, just maybe half the size, half the weight.
The closest amp to it is the Genz Benz Shuttlemax. I picked up a Max 9.2 some years ago and it has that ultra clear, crisp, precise and quick tone of my old Trace.