How are you positioning your back and pelvis when you ride? If you make a conscious effort to rotate your hips forward and flatten your back, you won't need to crane your neck as badly to look up. I know that when I started riding road bikes, I got into the habit of planting my rear as if I were riding an upright bike and then bending my lower back in order to get my hands to the handlebars... it sucked. Everything would hurt unless I took frequent breaks.