I was talking to a Utd supporting mate about Harry Kane. Much as I don't like him, he is a great striker and will score you goals. Utd do need a striker, Sir can't do it all by himself. So the logic in that move is fairly clear.
But it all comes down to price. Levy is notorious for being hard to deal with and I really can't see him selling Kane for less than 100m. You might get 75-80m up front/staged payments and another 20-25 in easy add ons (wins 10 more England caps, scores 20 goals etc.) but you are effectively looking at 100m. Which is a lot of money for a 30yr old who has a lot of miles in his legs, he rarely misses games for Spurs or England, and he already has dodgy ankles.
100m will get you a guaranteed 20 odd goals a season, injury permitting, but it will come with very high wages, feck all resale value in 4 years and an ever increasing risk that he goes the way of Rooney and Owen.
I'm not sure I would take the chance, for that amount of money. But who else is there?
Your boy from Napoli, who looked properly good when Pool "played" (ie got hammered by) Napoli. But he has no PL experience. He may be great, he may be ****. He is more of a gamble.