Ya if I was getting the SL it would be a 155. It's definitely on the table it's good to hear so many good things
You still manage to have a bit of fun on it eh? I wanted the Proto for the playful factor but really I'm probably overstating the difference between it and the SL
Oh yea, tons of pop, butters are pretty effortless, floats amazing in powder and awesome stability when hauling ass.
All that being said I haven't rode the Proto yet but its at the top of the list for my next board, mainly because I ride a lot of park. I have heard it can get a little shady at high speeds but not too bad.