There is (among graphics enthusiasts) a lot of debate what API/version of something to use with a bunch of hotly contested alternatives. I would like to convince you to give WebGL a try, and this blog post explains why. It will also quickly summarize a few things people usually ask about WebGL. There are many gotchas (like with anything) as well, and I am aware of a lot more of them than you can imagine. I will perhaps talk about them in another blog post.