I will throw a vote in for the Ameristep blinds that I have owned...Doghouse, Penthouse, etc... They are very affordable and have held up for me quite well over the last two seasons.

www.ameristep.com

You can get them at a variety of places but www.cabelas.com and www.sportsmansguide.com are probably the two I would turn to first as I feel comfortable ordering from both places.