If we sign him for £20m, its safe to say we have a striker with all the potential in the world, the currently ability to bag around 20 goals a season fully fit, and a striker who will spend years and years at Everton, or fullfill his potential and leave for over double what we paid for him.
Or flop and we've wasted £20m! But lets face it, he's the striker we've needed since after Yakubu's first season, especially seeing as we're going into Europe, which I believe he would excel in.