From my experience with bindings, here's a personal breakdown:
Marker: Unless you are willing to go top the line, don't bother. They break, they pre-release, they don't release when you need them. These are my least favorite bindings.
Salomon: I have 810tis right now because I'm a little guy. I like them them and they have held up quite well for me. A lot of people bash Salomon for breaking easily, but I ride damn hard and these babies have held up for two seasons now.
Line: I haven't tried the reactors, but I want to. The concept is excellent. If you have had knee problems or are super paranoid about your knees, I would give these a roll. I want them next year. The major downfall of these is that I know several people who have broken theirs.
Look/Rossi: Same bindings. These are solid and there is really nothing wrong with them at all. I don't like the heelpiece, however. If you take a fall , the heel piece can bruise your ass/leg up pretty badly. However, these are solid and dependable bindings and very few people dislike them.
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SSK