For the racket
I've been using the Ti SP SS for a year now, and I've had it strung three times, with BG-80, BG-70 and BG-65Ti. Even though it is more head heavy than the SA or SR, it is still a fairly evenly balanced racket and slightly thicker strings can add a bit more weight up top, which can be a good thing.
I think the BG-65Ti is the best string overall for the racket. I use nylon shuttles occasionally, when I'm coaching juniors, and I've found the racket feels a lot more comfortable when hitting the shuttles (we use Yonex Mavis). For playing with feathers, I prefer the thinner BG-80, but this string is better in a head heavy racket like the Ti-10.