First post on epicski, can someone help me choose a ski to get.
I own 2011 Line Step Ups 177cm and they are too big and heavy
I am 5' 10" and 200 pounds
I ski on the east coast, Gore Mountain, Jiminy Peak, Mount Snow etc.
You mentioned skiing one season so far. Congratulations on the beginning of your skiing adventure years.
My suggestion is to demo some skis at the mountains you ski the most. The demo shop at your local hills will have several models that are suited to their terrain and conditions, try a few and see for yourself what feels right. Buy a new pair when you're sure it feels right, or significantly better than your existing Line Step Up (which is, I believe, a terrain park ski?) If you're a park and pipe kind of person, let them know that's what you're into. At this stage, if you're not going to spend the majority of your time with park and pipe, I'd suggest a good all-mountain ski, and since you're on the East Coast, NOT a big fat powder ski.
As far as heavy skis, there's some advantages. I'm 5-10, 140-something, but I love my K2 Apache Outlaws, which are pretty heavy. They seem to want to go fast but ski really stable and I really feel in control with them. I suppose if I were racing I might want something more nimble, but for all mountain cruising, bumps, crud, whatever, they're fine - for where I ski (Pacific NW).
Have fun with choosing.
You date your skis, but marry your boots. Get your boots squared away first. Usually this requires a professional bootfitter. They should be very, very snug without causing pain.
As for skis, definitely demo. I wouldn't worry too much about weight. More weight can add stability. Keep in mind that you don't frequently need to swing them around. Merely tipping them should cause them to turn for you.
Most mountains have demos. At my local mountain - you could call it the Northeast, but it's also sort of Midwest - the demos are in the ski shop, not the rental shop. Any time I've demoed out West, that's where the demos have been as well.
I did a quick search at the hills you listed. Here are some demo links:
There's also this Epic thread on where to demo at Mount Snow
As an aside, don't be thrown off by the phrase "high performance ski demos". Most demo shops provide a variety of skis that are suitable for their terrain and for varying abilities. Good luck!
Length and width depends on what you're doing. Keep in mind the overall sidecut, camber and construction will made two skis of the same size ski completely differently.
But since you asked for "ball park specifics," I'll give you an example. I ski a K2 Apache Outlaw, length 170cm. It's fairly wide for an all mountain ski (129mm at the tip, 92mm under the boot, and 115mm at the tail). I could go a little longer, for my height/weight/skiing needs, probably not more than 177. If I was East and skiing hard pack and focusing on carving turns I'd want the width to be more in the 70-84 range.
Again, best bet is to go to the rental/demo shop, talk to the people, get some recommendations and try about 3 pairs of skis. Do this on a few different days. You will be your own best guide.
Also, I second Xela's post about boots. The skis will not perform as intended unless your boots are a good fit, and if the boots are a good fit you will have fun with whatever skis you choose. Might even like your Line Step Ups more.