I don't think BF is trying to make the other guys hurt on a hill climb, it sounds like he just wants to get to the top in reasonable manner.

go with a compact. His knees will love him for that. And nothing ashamed for using a compact double . If he wants to attack a hill and put the guys in lot of hurt, you can't be a weekend warrior. You need to train everyday!!

Graduate to a novice racer at 200 mile training per week.

I am soo over two pounds of body weight per inch of my height, its not even funny. (one of many simple rule of thumb to being a good climber).