That is a real TTX shock and NIX-30 forks (think 30mm Cartridge Kit). In other words, it IS track/race suspension. All it needs is to be properly sprung and maybe some valving work based upon personal preference.
And there is no single modification that has more affect than lightweight wheels. That is the one mod that affects acceleration, braking, side-to-side transitions, top speed...everything.
Then there are the controls on the left bar.
I am only saying that the comment of "Realistically nothing on the S model is any more track than a base with upgraded suspension" isn't entirely accurate. The wheels are a HUGE bonus (and the primary reason I went with the S).
IMO, all of that stuff is unnecessary and overkill for the street. But then again, a Panigale in and of itself is overkill for the street. So at the end of the day, all that really matters is what somebody wants and can pay for.
As previously stated by Mr. Rogue, basically everyone will just suggest getting what they got (that should be expected). I am just saying that if I was purchasing one KNOWING it would be a street bike, I would get the Base. Then I would use the extra $5-6k for an exhaust a tuner and gearing.