Booked in for my first bike fit with Specialized. I have opted for the cheaper one £50 as opposed to the £150 one. My reasoning was that I am a 45 year old with pins and plates in parts of my body and I don't want to be aerodynamic just comfortable..as I can't get aerodynamic. I do about 4500km -5000km a year and like doing sportives so its about comfort not speed.My question is... is the lower priced one the one I need or will it be a waste of money?