I just wanted to point out to everyone looking around that no matter what class you pick, you will be to solo effectively. Even the Priest, the premier healing class, has access to offensive magics that allow him to solo quite effectively. Mages, though weak to physical attacks, are able to use their ranged advantages and cold spells to give them time to damage monsters before they get in close.
So don't worry about wether or not you'll be able to handle situations on your own. You will.
Also, the con system works very well. If you see a monster of one above your character's level or less, then you'll be able to take it down. If it is one level above it will be a bit of a challenge, but you'll be able to handle it. Equal levels are typically not too difficult, and anything less is usually pretty easy. Though you have to make sure you are prepared with whatever buffs and other defenses you have.
Just something everyone should know. You can but pick the class you like the most stylistically, and no worry need be given to solo ability. : )
-Drachasor