I've been quite pleased with my 150 watt stereo Fender Mustang IV. Weighs half what a Fender Twin weighs (30lbs or so, easy on the back), has everything you could want inside including effects, 2x12 Celestion speakers for around $500. I recommend downloading the Fender Fuse software and tweak, tweak, tweak - you'd be surprised how many cool sounds you can make. You can also use the stereo effects loop with your favorite stereo amp modeler like the Eleven Rack. Pluging it it bypasses Fender's modeling so your just using the solid state amp inside the Mustang and the Eleven Rack as a front in pre - in stereo. Sounds killer!