I just reread the main question and saw this bit. So that seems to suggest OT to me – it’s perfectly possible to do these things on DT too ofc, but for one machine that will be around for many years and excels at controlling other synths, I’m saying OT. Also, you mentioned wanting to play live — OT has insane potential for this over DT.
I just pulled the trigger on a used OT MKII today. I will keep my DT for drums for now, but may end up selling it to keep OT and DN for a more streamlined workflow.