I will back up most of the advice in here.
Get the bigger ski, you will be mounting it center, which lets you throw the ski around a lot more easily. Besides the great switch preformance of a centered ski, I like the equal swing weight that you get. I am 5'10, and pretty done growing, and I ski on a center mounted par of Bluehouse MR 179's, I would have it no other way.
For bindings, you should look at the px12 jib bindings. Look, Dynastar, Rossi... they are all the same, just different colors, and possibly different din options. This binding is quite the breed, so you can save money by looking at older models, you can save money with confidence knowing you are on a time-tested design.
For boots, you need to go for what fits you. I foolishly bought size 28 SPK's a couple of years ago. I loved to ski in them, they were soft, comfy, and I could ski well in them. At the end of this year, I walked into a shop to see some new boots, I was fitted for a size 26.5 Fulltilt! Don't worry about growing too much, if you get a boot that fits you well, it will naturally pack out no matter how good the fit is, you will have great preformance from a great fitting boot, and you will have room to spare as you use the boot.
Well ther's my non-professional, but well researched (From NS haha) opinion on gear.