I've never tried
the GT-10, but the Boss forums seem to have many that still prefer the GT-8.
Basically, I've got most of the "popular modelers", but the J-station has a couple of settings, that with some minor adjustments, do it for me. Never really liked the Line6 stuff, except the "black face" sounds are nice, but I never have a need for clean Fender sounds. Not too wild on any Digitech stuff either.
The GT-8 is by far the most flexible and if you're just going for a good sound, and could give a hoot about emulating a Hi-Watt, you can dial in some amazing stuff, to the point it is almost too deep in what you can do.
I layer
my GT-8 with a Roland GR-33 synth, and if you blend in a sawtooth type sound, it can get amazingly fat. Strings and pads sound decent too.
Playing sax on the guitar is kinda goofy to me, but they sound pretty acceptable...
...boy...that got off tangent
