First, welcome. It sounds like you need to do a few more test rides! One thing to consider is that many folks here (self included) find that the stretched out position of a road bike is easier on their backs. (I found this to be true for motorcycles to. The typical upright "chopper" position but my back in agony for anything over an hour.) Do any of the bike shops you're visiting do rentals? Oh, one other thing to keep in mind, regardless of the direction you go. Get a good fit from the shop before you leave. It can make all the difference in the world.