Thanks Rockstar_not for all your info. However, I'd be a little overwhelmed with that level of complexity. I play 50's & 60's guitar instrumentals, so I'm basically looking for a good clean tube amp sound with a little slapback delay and spring reverb, which I accomplish now with a couple of pedals.The Super Champ XD gives me a great basic sound, I'm just looking for a little bit of enhancement for gigs.
Thanks again.