Yeah if you have a relatively short torso to leg proportion it makes sense to go 58cm. A bike even slightly too big in one dimension drives me nuts whereas a slightly too small frame in every dimension can be fitted with aftermarket stems, cranks, seatpost, or handlebar to adjust fit. Smaller frame = more adaptability. On the other hand if you lift maybe the bulk in your upper body requires a larger frame, but I doubt it. Pro cyclists are rail-thin and run frames that are one or two sizes smaller than typical cyclists. They're on bikes for hours every day so they know how to be comfortable.