DeadPcCat - As Bel said, try the 3 characters and see which you enjoy. Ofc, it depends what level they are, but you should get a good idea. Ignore my comment above about dps. That's just between Bel and everyone else in Team Awesome
By and large, the end game is pretty even. There are some classes which shine a little brighter than others (as is always the case), but as we've always said in the guild - Play the character/class you enjoy. You will be more inclined to keep with it and get better. But mainly you will enjoy the game more.
Hope to see you in game soon and enjoying yourself with our happy little family