Hummm, good question. That's an easy one for me since we only have one LBS in town. Would have to travel 30 miles to get to the next closest one. I'd recommend talking to experienced riders more than a salesman somewhere. I guess when it comes down to it most everything is opinion when it comes to equipment. But I do think there are some basic "rules" like: Saddle is moved up until your hips start to rock from side to side...then move it down to the point where the rocking stops. Cleats should be positioned so that the ball of the foot is over the pedal spindal. Seat fore/aft should put your knee (tibial tuberosity) in line with the pedal spindal when your foot is in the 3 o'clock position. There may be more...but after that it all comes down to the comfort of the individual person - which takes into consideration riding style, flexibility, etc.