So I spent a bunch of hours listening between the Tempest and the Prophet 12 and had to pull the trigger on the Prophet.

I like the idea of the Tempest in terms of its features and flexibility, but in the end the sound is what matters most and the P12 is so flexible, sound-wise.
I can control the P12 from my OT and have the cue out go to my A4 to get analog filters on some of my samples and the P12 can make up for the loss of a channel with the A4.
I make more ambient/experimental music that doesn’t rely heavily on a lot of beats so it was really just a matter of use.

Now that I’ve made my decision and have my setup planned I’m sitting over here all like:

Thanks for your input everybody!