Will you ever use them again?
Because trust me when I say this...You can buy a real cheap pair, use the foot warmers, good socks place cardboard under feet, and you should be fine...
I hunted and ice fished in same real cold weather with just cheap KMART brands and I was okay..Yes the high priced ones will work best...But cheap ones if only one time can work too..
No matter what type you get, you need to make sure they fit with the socks you will be wearing..Because if you wear two layers, you dont want a tight fit, then they will get cold..You need a little wiggle room in case they do start to get cold..
Also, use MITTENS not gloves...Gloves will get your hands colder faster then mittens..
OR these
http://www.nextag.com/convertible-glove-mittens/products-html
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Act as mittens, but can use as gloves if needed...For me, they were perfect in hunting and ice fishing