Railflex binding is definately not going ot be your best choice for park riding, if you do like your heads though (stiffness, little heavy) you shoudl probably check out heads mad trix. Thats gonna be one of the only skis that will hold an edge even close to your cybers outside of the park. Unless you can manage to get your hands on a pair of scott p2s, not sure what scott skis availablility is where you live. But the p2 is the best carving twin i have ever riden and judging by what your riding now, you don't mind carving too much and would want a twin that you could occasionaly rip groomers on, and be able to hold a decent edge. For bindings just look at higher posts in this thread. pivot series for overall goodness, upper end salomons for lightness, lines for saftey sacrificng durability.
Make your own choice, there is so much shit available now and people are ridiculous about how they claim skis are so much beter than others, sure there are some, but when your just begining riding park your not going to notice. In the end thalls are not going to turn your 3s, into 7s, and your 270s to 450s.