I was in your same dilemna. I came to the conclusion that Look bindings have worked great for me in the past and I have never had a problem with them releasing or not. I never felt unsafe with them. On the other hand, Line's binding is brand new and has not been tested by the masses yet. I'm not saying it doesn't work, but what are the chances that there is a defect the first year or the din setting scale isn't right. Plus, I had no idea when it was coming out (I have gotten 3 different dates from Line themselves and the rep told my shop October 1, and guess what, no binding). I could think of many reasons why I would feel safer in a Look binding, at least this first season. I patrol at a hill where there will be lots of guys riding it when it comes out...I'll update everyone on the injuries/lack of injuries later this season.
Just get the p12 without the lifter, save yourself the headaches, and rip it up.
I am the guy that fixes your broke ass.