I definitely like the Mouse vs the Deep, so I'll just have to decide between the Mouse and the MB2.
I played my Deep 5 on a half dozen tunes with a Steely Dan tribute band Saturday night. A couple of years back I used one with a funk band.
It's not just for straight jazz. Depends on how you eq and play it. The deep has a bit different feel than the MB-2. The Mouse is a very different beast, mostly due to the 30" scale. That can throw some people off (it did when I tried to swap between it and 34" scale bass on the same set), and it tends to have a much more blooming sound. But they are very cool instruments - I had both fretted and fretless variants for awhile.

