I tend to do most of my music composition in the box nowadays, so there's much less jamming for me and more noodling around on a keyboard until I come up with an idea (if that), and then developing the rest of the idea fully in the sequencer. But even so, it might be nice to play around with and be able to take places without having to worry about or deal with a computer -- just having the immediacy of the machine and nothing else seems nice.

The main question I think about is whether I want to grab it or one of the volcas. When it comes to live jamming, it's likely that a groovebox is closer to my cup of tea.