I guess I'm a bit of a packrat when it comes to keyboards and such. With the exception of my old Hammond M102, I still have in my basement den/playing area (it doesn't really qualify as a studio) my Hammond X5, Roland e38, Kawai WK50, Yamaha SH110, Micromoog (for which I paid a horrendous sum in 1975), and my main squeeze, my Korg i30 with a Korg ih harmonizer, EC5 pedal, and a Behringer MX602A mixer.
Amplification is comprised of a Peavey KB300 for the boards, plus a couple of EV mics via the Behringer and the ih, then into a Peavey XR600F going out via a pair of Fender 1225's.
Phew! That's it.
Oh, hang in there . . . there's a Tascam 244 recorder via a Kenwood amp and Celestion speakers. Not purist stuff, but it works for me. There, now I am done.