The Beaver is very similar to a Big Bead Aviar in a very grippy, flexible plastic. Really, can you go wrong with a flexible Beaver?
The Woodchuck is the same disc as the Beaver in a super duper buttery soft plastic. I don't like super duper buttery soft putters, so I passed. The Polar Bear is again the same disc in a DX-like plastic that only comes in light weights. I like heavy putters, so I passed. I think the Woodchuck only comes in light weights as well, but I'm not 100% on that.
The Timberwolf is a really great fairway driver. Straight with a lot of glide. The plastic feels like a flexible Champ blend. I highly recommend it.
The Wolverine looks a lot like the Timberwolf. It's supposed to be the more overstable of the two, but I found that it was pretty easy to turn over. The plastic on it is stiffer that on the Timberwolf. It wasn't a bad disc, but I was hoping for it to be more of a Banshee-overstable disc and it wasn't. It overlapped with the Timberwolf a lot, and of the two I liked the Timberwolf better.
The Swift Fox is pretty stable for a 154 g disc. It is very similar to the Timberwolf in a more DX-like plastic. I gave this one to my daughter, and it is a very beginner-friendly disc. I would recommend this disc as well. Again, it overlapped with the other drivers in their line-up a lot. Really I could see using any one of them as a fairway driver, but I could not see having more than one of them in my bag.
The only Mid of theirs I have ever come across is the Caribou. Not very long, and the plastic was not very durable. It only came in really light weights. I wasn't very impressed. They have the Grizzly and the Moose on their site, but I've never seen either one.
They really do not have a Max D super duper long range driver.
So I could easily recommend the Beaver, Timberwolf and/or Swift Fox. I could also recommend the Woodchuck if you like really soft putters or the Grizzly Bear if you like a lighter weight DX-type putter.