PAD's stuff is alright...
They are lacking systems complexity and are more for a get up and go user base who are just beginning to explore FS addons, but they provide a reasonable Do-228, Mu-2, and Shorts series. Not top quality by any means when compared to most other aircraft, but better than most people could do, and still nice representations of those aircraft! All in all, I would suggest grabbing the Shorts series aircraft from them first and foremost, but in my opinion, you can find better representations of the DHC-6 series and DHC-8 series through Eric Dantes, and Dreamwings, respectively.
I have already mentioned Shupe's great addons in a previous post in this thread. Keep on the lookout at the end of this month for a new Beechcraft A28 Destroyer/XA-38 Grizzly by Shupe and others.