Gents I greatly appreciate all the advice, but I decided to hold out for a more powerful amp/receiver, though still most definitely vintage. I know I want something that can and will, with grace and aplomb drive speakers
just like the KEF R-300, which are in fact exactly what I have my eye on above all others.
I'm not sure whether I will eventually add a sub, but once I have my receiver and/or phono pre+amp, plus my stand-mounts in place, I'll decide then. May also upgrade my TT to a nicer vintage down the road if I find myself unhappy with my odd Philips belt-drive/Ortofon Blue combo I have now. When I can compare next month with Morbid's much better TT that should help me know where I stand.
I also know I want to stay vintage for all components except TT cartridge, phono pre-amp (if necessary) and speakers. That said, suggestions? Should I be considering vintage speakers that would sound as good or even better than the KEF R-300s? I was considering the 50th anniversary but it's just too contemporary for me. I must just look at these gorgeous things in walnut.