How many LP's

djf1, Your small-ish LP collection is merely a correlate of your age.  At 55, I surmise that you came into the hobby at a time when LPs were considered de classe'.  Keep on buying, is my advice.

As for the TransFi, without a doubt that would be my choice if I ever decide to put up with a compressor and the noise and maintenance thereof.

Last night I picked out of my Duke Ellington collection a Pablo LP, "Duke's Big 4", or something like that.  Turns out I have two copies of this LP, and one is an original German pressing.  Needless to say, that's the one that got spun. Duke + Ray Brown + Joe Pass + Louis Bellson.  Wow!!!!  Was not in regular rotation.  Great fun. Pablo's with the blue/white label are fantastic.

This put me in the mood for more jazz piano, so I got out Oscar Peterson in a quartet, also with Ray Brown on bass.  Another wonderful experience from my not regular LPs.

It may be true that most of us listen to about 100 different LPs in rotation, no matter how many LPs each of us owns, but I posit that in order to develop that 100-LP rotation, you need to own at least 1000 or more.  More is better. This makes it possible to go outside the rotation once in a while for a test listen to either a new musical genre that is under-represented in your regular rotation, or a new artist, etc.  Once in a while the experience is such a revelation that the LP breaks into your list of the regular 100.  As a result, you now have a regular 101, or some other LP gets knocked off the regular rotation.

I've got about 2500.