You have to have an iLok to run the Waves GTR Demo. It's stupid. Also, Waves GTR's AU version doesn't support Digital Performer, only Logic. I have no idea how/why they did that, really adds insult to injury.
I wish I could use my POD XT for live shows but I just don't trust the PAs at the small venues I play to bring my tone through with the punch and clarity I need. Half stack is the way to go!