Let me add my experience. I bought the center stand and had it installed at my initial service. I did miss the aesthetics of the belly fairing, but enjoyed the convenience of the center stand. There is a built-in grab bar in an opening on the seat cowl and the Busa is very easy to lift up onto the center stand.
However, after my first track ride, in Sept., I decided to buy a race stand and take the center stand off out of fear that I would drag something next time I went to the track. (I had never dragged anything, and still have about 3/8-inch of unscrubbed rubber at the edge of my OEM rear tire. From the posts above, it sounds like I didn't need to worry and could have left it on.)
Removing the center stand was a big job. Much bigger than the shop led me to believe. Even with my mufflers removed, I couldn't get enough clearance to remove the two mounting bolts for the center stand until I completely unbolted my exhaust headers from the engine, which in turn required removing the fairing lowers both sides, unbolting the radiator to allow it to move forward and removing the fan from the radiator. After I finally realized I had to do that, it was fairly easy to do the rest. If installing the stand, I don't know how I would have been able to stretch the double spring enough to get it on without some kind of special tool. It took care of itself taking it off.
The center stand probably weighs about 8 lbs. I can't tell the difference without it, but I like having the belly fairing back on.
The big difference now is that I have to have someone around to help me get the bike on the race stand, which is not always possible. So checking the air pressure in the rear tire is a little more of a hassle now, as is lubing the chain.