I like my Line 6 amp played through a 2x12 Celestion loaded cab. I've used it in all kinds of situations and have never had a problem with it. A couple of the factory presets on it can be noisy at times but make a great starting point for tweeking your own settings. I agree with wes though, don't trade in your old amp. Any time i have traded in an amp i have regretted it, same with any guitar I have owned. Guess I get to attached to my toys lol.
BTW. My first post but I have been reading these forums for over a year now and I love the wealth of information here.