I was being flippant when I made my previous comment. I guess if I'd added a smiley, vondalyn might have known that and wouldn't have gotten so riled up.
When I traded in my Victory Vision and picked up the Spyder RT one year ago, I had never ridden on three wheels other then when I briefly demoed the Harley Tri-Glide (which I hated). It was a 140 miles home from the dealership through intense twisties. A friend of mine accompanied me on the ride to and from the dealership, and I had no trouble keeping up with him and his Harley on the way home. It took some getting used to the dymamics of the Spyder after 38 years on two wheels, but I caught on fairly quickly. But I did notice the feeling of being on a boat as the Spyder swayed this way and that through the twisties. Yes, I enjoyed the ride. Yes, I could've stayed with the stock sway bar and would've been satisfied. But I went ahead and installed the BajaRon sway bar and immediately felt the difference. I ride aggressively. I take corners fast enough to make the nanny light come on. I push the envelope on twisties. The stiffer sway bar helps make the ride more fun and enjoyable.
As others have stated, ride it for awhile. If you're comfortable and satisfied with the way it feels, stay with the factory sway bar. But I guarantee you if, after you have ridden the Spyder for a period of time, you will notice a marked difference in the handling if you install the BajaRon sway bar.
It's your ride. Do what you feel is best.
Pam