I would then suggest the POD XT Pro, because of the vast amount of options you can use for guitar and bass. The input of the UX8 is an overkill for you. Unless you are looking to record multiple mics at a time. From what I can see though, you probably going to do one instrument at a time.
You might want to consider something even simpler, like the UX 2. Might not have the vast amount of options for guitar and bass, but if you have your own favourite line of effects to play with and you are ok with the standard offering that Gearbox have, you might wanna consider that one instead. It also cost less.