Adam, I'm going for the 'Ignorance is Bliss' apporach rather than going down the 'Techoinformation Overload' road.
There are only TWO (2) Klingon BoP models.
1) The B'rel-class scout (a la STIII:The Search for Spock) at about 150 metres long, crew of 12 with a cargo bay that could be converted to barracks to hold some troops. I actually agree with the SFC3 default armament layout. I call it a frigate and companion vessel to the K't'inga (both are non-SFB ships, same as the Fed NCM, CAI, and BCE). As for all the different names, well, I go for this approach, based of some novels I read. The K-BoP's full designation is the B'rel-class D12 scout (Like the Akif-class D7 battlecruiser, K't'inga-class D7T battlecruiser, etc)
2) The K'vort-class battlecruiser (a la TNG:Yesterday's Enterprise). I played a few SFC3 games of the final battle in that episode - 3 K'vort destroyers against a Galaxy-class, and it worked as a fairly even matchup on default loadouts. Bigger ship, more capable vessel, but still only the size of a Miranda, or Constitution, max. (280 to 300 meters long). No where near the size of a Galaxy-class.
The D7/K't'inga line are battlecruisers in Kirk's era. By Picard's time, what with the Vor'cha-class battlecruiser and Negh'var-class dreadnought, the K't'inga-class D7T is only a light cruiser in terms of firepower, etc.
I liked Quantum Leap, and barely remember watching St. Elsewhere waaay back in my youth. Never heard of the other shows, though.