I LOVE LLBean stuff! It can be a bit pricey, but you can often find used ones on Ebay or even on www.llbean.com on clearance.
The sleeves of the jackets & legs of the snowpants have a little extra stitching that can be snipped to allow them to "grow" by about an inch or so. My kids usually get 2 seasons out of them. They are VERY well made, have a good re-sale value & most importantly, keep my munchkins nice & toasty warm, so they're worth the money to me.
(Just FYI--they tend to be cut a tiny bit big. My kids are very small, but my son, who usually wears a 24 mo, is wearing a 12-18 mo jacket & my daughter, who wears a 5/6 wears a 4T in their stuff).
Good luck!