I have been a big supporter of Union for some time now, while i will always ride them, i think for my second set up i am going to pick up a pair of K2 bindings. Never ridden a pair, looking to demo some soon, but was wondering what people had to say about them. Personally i am skeptical of the k2 autos, but if they work right i might buy a pair. One thing i have noticed is that k2 is making some pretty sick looking bindings, the k2 auto and auto evers are freaking sick.
Union Danny Kass signature model
Lib Tech Skate Banana
K2 Darko Boots