the GT8 is MUCH better than the GT6 with it's new upgrades. Personally, I like it, and use it live 3 times a week straight into the PA along with
a Roland GR33 synth. No amps anywhere.
Before getting the GT8, I looked LONG and hard at all the options. The GT8 is without question the most tweakable...but it's downfall too, as it has a learning curve. The presets bite. The effects excell, and most would agree the best on the market. People that complain about the overdrives either are hooked on "real" amps in my experience, or haven't given the GT8 enough time to experiment.
The POD isn't bad, but the GT8 goes beyond what a POD can do, and for recording, I wanted that option too.
some pros for the GT8:
two amp sounds at once
dynamic control of your sounds
effects in ANY order and they're decent too
good switching.
cons:
no decent computer interface for programming.
btw...I came from a Marshall/Ampeg/Fender tube amp background. Wish I had the GT8 during the 70's, 80's etc.