I would think Plumbutter makes more sense as well
although if you look at the coco as more of a modulation source (5 S&H/T&H / 5 FMable TRI outputs) that go from low and slow to high frequency things could really open up on your bugframe
2 iron cross outputs are funky organ sounds based on delay times
a strange stepy square wave
I almost bought one of the bug frames but I think I am going to try out the op1
if you are into programming I would say pick up a used shnth as it can digitally go to more regular and also Ciat-lonbarde territory.
but if you just got a bugframe you most likely want some more banana jacks
plumbutter was my first real hardware synth. I still feel that from the stuff I hear using these instruments most people don't make use of the AUX input jacks that make the plumbutter a capable sound processor.
the plumbutter is just too much fun I'm planning on getting some minirig speakers to make a little portable setup