it is nice to see that this thread has been extremely friendly to a newb. here's my advice man...
since you were a blader, and you are pretty much my exact same height, i would say a ski that is 170-175 would be perfect for you. it also depends on what you are going to use this ski for. if you already have a pair of all mountain skis, then something like the 160 Fujative or the 171 Invaders would be a great choice beacuse they are cheaper skis that are great for the park.
if you are looking to find a ski that will not only suit you for the park but also for the rest of the mountain, i would say some good skis to look at would be the 170 or 174 Public Enemies, the 174 Scratch FS, or 172 Mojo 80.
There are plenty of other good all mountain skis out there, and I would say your best bet to find the ski for you is to go to a demo day and try all these skis and see which one suits you the best. the proper skis for each individual can vary greatly based on a person's weight, height, skiing background etc. hope this helps and you get a killer pair of skis.