Whatever you do avoid BOSS GP20s and OD20. I was unfortunate enough to get both and I have had nothing but misery from each. Both have now bean sold. I also have had problems with the GE7 EQ peddle. The GE7 was OK on its own (or with an MZ2) but if you use it in conjunction with either the OD20 or GP20 it was HORRENDIOUS. The noise floor is beyond saving even with a good gate ! I used to (before I started recording in the 80s) love Boss kit to death however after my latest experiences I will think twice before I use any of there kit.

Incidentally I now use a POD pro and think it is a truly cool bit of kit. It is not a Soldano or a Dumble but a POD and that is more than I want.
Happy playing
S