Well.... I demo'd both the Sl and the proto. It was my 1st time out this season here on the east coast. I rode the SL first and the proto second. To be honest... I felt the proto to be a bit stiffer, which I found odd. I was also really tired by the time I had to demo the proto so perhaps it affected my reasoning. The carbonium top was really cool... snow didn't stick to it as much as the SL.
After a VERY long time debating back and forth between the Sl and the 154 proto..... I ended up getting the 153 SL. It was a really smooth ride for me and I saved $40. It was also a bit less wide in diameter width.
The extra $40 I put towards a high intensity yellow lens - along with new Oakley Canopy goggles which fit my helmet nicely.
I have some pictures attached of helmet/goggles, the run I tested the boards on, and the board itself.
As for binding - I got Burton 2013 cartels on sale on a store near me. Hopefully I made the right choices!