Wow sorry I didn't see your topic until now. Yeah there are some great synths being made right now, and there has been a resurgence in analog stuff. All the DSI stuff I would consider worthy of exploration. I found a used Poly Evolver keyboard a couple of years ago, they're awesome and very versatile, although they're half digital and half analog. There are some digital processors and ad/da converters in there but I think honestly it was solid attempt by Dave Smith to bring a very fresh approach to synths. He largely succeeds but it has a learning curve with the sequencer etc.. I still need to spend time trying to program it.
I also own a Juno 60! I have the programmer they made with them too. A very good investment for the Juno 60.
I have owned a JX/3P and recommend getting a PG-200 if you have one, otherwise editing parameters is a bitch.
There is a very deep amount of sound programming you can learn with analog synths, so yes it could be a can of worms but I consider it more like a whole new dimension in sound.
Keyboard players can easily transition into synthland but There are several famous artists who were chicken-pecking keys to play their music.
Your budget should be a consideration. For the money I like the MicroKorg. It is a modeling synth though not true analog.
Artura Micro- and Minibrutes are both really cool under $500 synths. Also apparently Behringer has released a hardware analog Minimoog copy module. It is very attractively priced.
You could get into Modular building and stuff like that, with patch cables and routing possibilities limited only by your own motivation.
There are many famous and not so famous synths that are still great instruments today.
Minimoog model D
Other Moog mostly analog synths, Micromoog, Multimoog,
Sequential Pro One,
Roland made a bunch of now-classic synths that are great sounding when working properly:
SH-1, SH-2, SH-101, (there are many others), Juno-6, Juno-60, Juno-106, Jupiter4, Jupiter 6, Etc..
Oberheim made lots of great synths.
You can find newer stuff on a budget as mentioned the Artura and Behringer synths, there are others.
If you can try something out prior to purchase, you might find an interface that you feel like works. Who knows, maybe playing synth along with drums will jolt you into a more creative and fun experimental zone.