Steer clear of anything OMC - reliability isn't bad, but getting parts is challanging (this will also solve your ford issue). Mercruiser product is generally pretty good, you'll be running an Alpha drive - lots of those around, and parts are easy to come by. do not buy the 3.7L mercruiser in any form (165, 170, 185 or 190hp) parts are scarce and they are loud engines. i wouldn't buy anything with a 4 cyl if you are planning on doing any tubing or skiing, you will need the torque of a 6 cylinder to make that enjoyable.
Volvo makes a great product, but finding a servicing dealer can be spotty.
you are right to stay away from bayliner - poorly built, same with mariah.you'll be able to tell very quickly what is good and what is bad at the age you are looking at. good brands include:
Sea Ray
Crownline
Chaparrel
Rinker
Doral - up until 2000 then they went downhill
Chris Craft
Wellcraft
There are plenty of good builers out there, but at the age you are looking to purchase, anything that is in good shape will be a decent purchase. if i was looking for something, it would be a 1992 -1996 sea ray 200/210 br with 4.3l 4 barrel carb - very good boat - roomy and reliable, or if you want something a bit smaller - a sea ray 180/190br again with a 4.3L 4 barrel. stay away from the sea ray "ltd" models and the "5 series" models (175, 185, 195) - they are not good boats.
Your inspection of any used boat that age should include (other posters add in if miss something):
hull for osmosis blisters, delamination and spider cracking
interior - rotting seat bases, floor, stringers, transom
gauge function - everything work?
engine - compression and leak down test, electrical, ignition, and exhaust
drive - water pump, bellows, gimble ring, u-joints, gimble bearing, seals, shift cable
good luck on your search