Huntelaar is not especially a target man .. he's more of a 'fox in the box' type of player. I doubt Huntelaar will come to Spurs, but if he did then he and Crouch would probably be an effective partnership, just as Crouch and Defoe have already proven to be.
Trouble is they would both expect to play if they go there, and you already have Pavlyuchenko, Keane and Defoe, all of whom have be signed less than 12 months ago. Signing Crouch alone is pointless enough, signing both him and Huntelaar just crosses the line.