I'll be honest with you, I like both. I don't think I really have much of a preference to be honest, although I will say that I prefer non-concaved to concaved. I have noticed quite a difference between them both. That's not to say that a concaved bat will never play as well as a non-concaved, but I find non-concaved is more forgiving and are more responsive.
I would probably be in the middle and say around 25-35mm edges with no concaving at a decent weight of let's say 2.12-2.14 is my preference now. I think 2lb 4oz is far too light for me! I don't mind if the edges are small, as long as the sweetspot is large!