| Hmmm...Dunno. We've had this conversation before. If you want a bike that is much more rare than a standard Strada get the SP4. But, in my book, anybody that buys a bike like an SP doesn't so much own it as have a responsibility to cherish it, keep it original, ride within limits that mean you're not going to be the one responsible for depleting the world supply of SP's by one. If that was my goal, I would've hung on for an SP.
Since I want a bike that I can modify to my own tastes, ride in the wet, ride hard and not have to worry quite so much about thrashing, a Strada fits my bill better than an SP. | 
Jools
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