Something in between Jan Ullrich and Lance Armstrong (though these 2 are quite similar in body size/shape i believe). Smallish upper body with strong but not overly large legs to keep the weight down. I spose around 5'10" and 70ish kg would be around the mark, with Jan's thighs and Lance's calves talk about ripped!!!
If you have large legs you have to have a big upper body to stabilise them. My legs are pretty good (longer than average for my height) but I need them to be able to move quickly enough to stress my lungs and heart (my legs blow apart long before anything else) So I don't think I need the lungs to be any bigger but I would like a new spine to replace the RS one I have at the moment. Back pain is a big problem. Other than that all I need is to train harder.