I have a messenger v1, messenger jr, studio1, studio boost, and studio boost mini.
I think my ultimate favorite for both sound and functionality is the studio boost+ messenger v1 combo but it also takes up the most space.
I use the studio boost mini with the messenger jr and it works/sounds great, I have the SBM underneath the board and the messenger jr on top, space is at a premium on that board and the compact size of both of those pedals make it work out just perfect.
I have a third small board that uses the studio one at the end of its chain and it certainly does the trick, so I say just get whatever you can get your hands on!