Hello, this is my first post. I would like some recommendations on buying a new road bike. Something in the range of riding in local bike rides up to 100 miles. Training in the 100-150 a week range also. This is my first summer in cycling. I gave up a passion for running because my knees could not handle the stress.I have local bike shops selling (Raliegh,Giant and Trek) bikes.Any input would be appreciated. Thanks for your help.