Yea, go with 70% MAX. Even then you might have to cheat it with product to get it to look the way you want.

Keep in mind that you need to take into account the condition of your existing hair. If your sides are thinning I wouldn't go any higher than 65.

That pic actually looks a lot like the piece Debbie cut short for me at the Windsor convention. Mine started out at about 70%+ but has since shed down to probably less than 60% on top and is thinner than the pic you posted at this point. Mine is a medium wave unit, but you have some flexibility with the curl when cutting it that short. I would say just go with bodywave.