haven't tried any framuses either, unfortunately.
definitely try as many of the other engls as you can, too- if you really like the powerball there's a good chance you'll like the other engls too, and you may find one which you prefer to the powerball.
from the sounds of things you've tried a load of nice amps, so you're probably reasonably safe by now to stick to engl. though obviously if other things come along you might as well try them too. :)