After having played all 3 in the beta I must say the Titan was the best for it's utility in all situations, which is a shame because I'm a Hunter. In PVP I didn't find that it mattered much which class was played, (I played as a Hunter mostly and did exceptionally well). Though, in PVE, such as the strike, I think the Titan was and will be most helpful and therefore the best class The Hunter just didn't have anything to offer in PVE. As far as raids go I can see a Titan being a coveted class for it's utility.