I got a Bass Pod (not XT) on sale since the XT's are out, but it doesn't work quite right so it's going back. Looks like I'll have to spring for something more current. Here's what I'd like: -Decent amp models with good tweakability -Solid envelope effects -Good octave effect -Reasonable chorus/flange -Tremelo (not vibrato) -Ease of use live So which is better? Pod XT or GT-6B? Or something else altogether?