[LeftyReeler]

Check the classified's here saw a few boats listed that were on the higher end of your budget.

Good luck in your search, thats the best part of buying a boat, everything else then costs you $$$$$ haaaaa

Few trusted names you might like in the low 20ft range aside from the higher end (Whalers, Grady, Reg, Edgewater)

Hydra-Sport
Sea-Craft
Mako

Cobia's got a face lift a few years ago and they have become a lot more nice looking, not too sure the hull quality on an older one
pre-takeover but so long as the hull has no stress cracks and wasnt abused I'd concentrate my efforts on the newer power like you have
as that will be the most costly to maintain in the long run.