Yup, turbo parts are heavy.
Touring is a good trim level. At least you get auto climate control with that. I liked that feature in my 5, set and forget.
The Bose system is probably a bit better especially with the high end, but it's still overpriced. I like the Boston Acoustics systems Chryco had in some of their upper trim level cars, but honestly I like the stock system for now, it is bass heavy but it's pretty clean otherwise.
The 2012 3 is not a Skyactiv platform, it just has the engine sans 4-2-1 manifold, the transmission, and a more aerodynamic body compared to the 2010-2011, with a coefficient of drag down to 0.27 from 0.29. The redesigned 3 will be on a full Skyactiv platform.