Man the ZX14 and the Spyder, now that's two different worlds. I went to the Spyder to give up the speed and peg dragging, while I was still able. The new 14 is totally awesome... 190 HP at the rear wheel and ok for comfort. Have you rode the BMW S1000RR now that thing is awesome with ABS, Stability Control, traction control, Race mode, and slick mode if you are a very brave man. I love the ZX14, dislike the Busa, the Spyder keeps me under control and still gives me a riding sensation.
Why not keep the Spyder and buy the ZX14? That would be the ticket. I would buy one today to accompany the Roadster but I made a promise to my wife that I would get off two wheels.
IMO the Ducati can't compare to the 14 or the BMW.