Ahh I should have checked the site. The Solo has 2 layers while the P180 has 3 layers (of sound deadening material). :-p
I think 2 is good enough although I kind like the P180 looks, but they might like the other's price. :-p I could also steal a bunch of sealant from my dad's work and completely sound proof the :banana::banana::banana::banana: out of a case. Might end up being toxic somehow though.

