I went thru the neck problem for years and was always in pain. My road bikes were 58's and I am 6 feet 1 inch tall. even with the tallest stems on racing frames my seat was 4 inches above the bars. I finally bought a Trek Domane in 60 cm with an extremely tall head tube. Even with an elevated stem my seat height is just even with bar height. My neck pain during rides is gone. I no longer have to strain the neck to see straight ahead. I do wear trifocals which did aggravate the problem.