They're not as good a deal at the price point, but I'll second Mikestang. I got two of them a few days and they've been hashing away happily.
They are both in what I consider the fun section of mining. I'm not sure price per power, or roi really come into play in this section.
It is one that you do for the fun of it. I am doing lotto even though I know I will not win chances are.