The TH30 is a bit like the Tiny Terror, but with more knobs, so you can make it better. Whether or not you like Orange amps does seem to have a lot to do with your guitar. I'm probably going to get an EQ for using my Gibson. A lot of people use EQ pedals anyway, so if you've already got one, you shouldn't have any problems with an Orange.
Personally, I think this amp has a lot more punch than Mesas. Don't get me wrong, I like Mesas, too, but this Orange is the way to go for me.