I've read a little about the Boss Super Shifter for two-part harmony effect for guitar leads...is this the best option? Basically, I want to be able to play a few tunes in a cover band that currently has only one guitar player. (Thin Lizzy, Allman Brothers, etc.) I don't need it to cover a lot of bases or offer a lot of tricks - just simple lead harmonizing. Can the Boss pull this sort of thing off? Are there other (not-too-expensive) options I should consider? Thanks!