Like michaeldcoates said, all the versions are slightly different. I suggest you check out the screenshot thread, the threads dedicated to the particluar version, and maybe the thread with the poll of different versions.

I have multiple versions (Dr. Gonzo, TR47, Isomix, and EditDroid) but havent actually gotten around to the TR47 version, have only watched the holiday special from that set. Of those my favorite so far is the EditDroid but im also looking forward to Zion's set as well as MeBeJedi's. The Isolated Score on the isomix is great and when i watched that set thats how i watched it, the EditDroid also has an isolated score but i havent listened to it yet.

as far as widescreen, I dont think there are any full screen transfers (someone correct me if im wrong). Also, all the transfers are letterboxed except the Dr. Gonzo which is anamorphic (again, someone correct me if im wrong) so if you want anamorphic you would need to go with that set, otherwise any of the sets will give you widescreen.

also check out the torrents thread, that should answer your where to find it question.

-Darth Simon