It really depends on what you want to achieve TBH.
If you want to replace your separate pedals, or enhance them with more options, then something like the Zoom B1-Four might be a good place to start. The MS60B is an old model now, and the B1-Four is more recent, and hopefully benefitting from upgraded chipsets and better effect models.
There are a couple of good looking options in the Effects For Sale section just now:
Zoom B2 Four
Line6 M13
Line6 M9
These will give you a good selection of digital effect models to play with. Not sure if any of them have FX Loops though.