I've also tried out PyCharm Professional, but the experience with cells and iPython was just worse for me than in Spyder - so I'm only using PyCharm for refactoring right now. I think the main problem was that errors/results from cmdstanpy would simply cause PyCharm to crash/hang instead of getting handled properly like in Spyder.
My ideal IDE would combine PyCharm's variable explorer and interactive debugger with Jupyter Lab's plotting, widgets, and the ease of rearranging cells. Oh, and I really need a duplicate line shortcut, which PyCharm, Spyder, and RStudio all have, but Jupyter doesn't for some reason.
I know many people use VS Code for data science, but I haven't used it much. If you have time, would you share your VS Code setup?
Cheers!