Ok girls...I know that endurance bikes are supposed to have a slightly more upright riding position & of course, performance would be opposite (nice & low). I'm not exactly sure where this will all lead, but in a search for just the right bike...what are the differences? It's gotta be more than just how low your upper body is while riding. If riding with a group (maybe faster paced), wanting to do some decent hills, some century rides (when I build up to that) & maybe some racing in the future. What bike would be a best all around? I know the performance bike is a lower riding position, but would you think that would be something much more versatile? Especially if I'm thinking about racing? It's all very confusing, but I'm just trying to figure out a nice little list of what I need/am looking for before I just drop into a bike shop of very experienced riders & look like a freakin' moron. Anyway...I've done a couple of google searches & I'm not finding anything except some blah, blah, blah with a bunch of opinions on the tooth number on chain rings. I've got A LOT to learn. I'd love to hear your input if you've got the time. Thanks in advance!!