Christ(owner of Tri-Tech) is very nice and knowledgable, he will help you out and make sure that you are on the right bike. I would go here first because you will get a good fit and excellent service.
I would assume that you are going to Bike Source to ride the Cannondale. If so, call and schedule a “fit” because some of the guys will put you on a bike that looks right (from standover height) and send you out the door.
I’d skip entirely the other shop. Christ and Leanne are both on their game and they support the hell out of the sport. When I lived in PA I would make the 3+ hour drive to get there.