5'6-5'7" 160lbs. Intermediate skier around Tahoe mostly.
I'm looking at http://www.sierratradingpost.com/ but can't decide which ski is best.
Depends on what you ski most: powder, groomers, trees, bumps, a bit of everything...? A bit more info on what type of ski you're looking for might get you more suggestions that just the info you provided.
I won't be snarky and say buy from somewhere else. If you're buying from stp, (with an additional coupon of course), i'll help you out and shorten your list selection to look at or read reviews on:
rossi S7, E98
blizzard bushwacker, kabookie
atomic blackeye (with bindings)
go read reviews on these. I did not look at sizes so I don't know if they do have your size. Also watch out that the discounts are just flatly applied to the MSRP. Some of the discounts are a great deal, some are not as good of a deal since the actual pricing for skis vary wildly more than STP keeps track of.