There are a few out there. Other than the Manufacturers models (JD,NH,Kub) there is Woods, Lucknow, Puma, Allied, Meteor, Lorenz.... That's all I can think of right now. Of these I have seen the NH, Woods, Lucknow, Puma, Meteor, and Lorenz. The Lucknow is killer, probably too much for most people. I liked the NH and Woods a lot. The NH is pricey though. The Puma is a good blower though, a friend had one and was happy with it. The Meteor and Lucknow are probably very capable, but I wasn't overly impressed with them.
If you do a search on Snowblower/Snowthrower you can find quite a few discussions on them.