Welcome to TE, tulips adivce of test riding bikes is the best way to choose a bike. In addition my two cents would be don't fall into the too much information trap. It's easy to get overload when you're shopping for a bike. If a shop is bombarding you with information that is going over your head or not listening to what you are asking and answering your questions, try another bike shop. The place you do business and their after the sale policy and treatment are equally as important as the bike, you need a trusting relationship with them and and a sound comfort level.