Ride what you like...

5-11ish here as well, 58CM Trek's are what I ride. Trek's run small - my other bikes are 54-56CM and have similar geometry.

And a Domane isn't a pure race bike, has more relaxed geometry - probably why the fitter suggested that size. And probably why the bike feels less sporty to you. It's an endurance bike - built for comfort. If you want sporty, try the Madone.

Yes, the stock bikes tend to come with wide bars and long cranks - your shop may swap them out, or not.