one of the perpetual questions i gotta resurrect: what's the best (affordable!) busking amp? (the Mouse, the Pignose, the Crate?) has anyone tried a Freedom Amp before? (news.harmony-central.com/Newp/2000/ElectroHarmonix-Freedom.html) they seem pretty popular around New York for jazz&rock guitar types. anyone know how it sounds for harp? clean? dirty? feedback?