Your boots are the most important part of the equation. There's no reason to spend lots of $$ on bindings since you've never snowboarded before. What if you drop hundreds of dollars on a setup and you find that you hate it?
Since it's your 1st time snowboarding, go rent some boots and bindings and try snowboarding before you buy anything.
If you fall in love with it, most bindings made today are pretty good. Anything from Salomon, Rome, Union and K2 will be good stuff. It's tough to go wrong with any of those.