Please don't run the ninja. Although it's a great pipe, it's not a Doppler.
I'd be reluctant to run a Gianelli pipe. I think it's the same as the Conti pipe isn't it? The thing I dislike about those are the quality of the pipe themselves. They are made of such thin metal which makes the pipe unbearably loud. but then you probably don't care about that though....I dunno....
I'm not sure what my top speed is. I feel like I'm maybe doing 55 at the most (I always think I'm going slow). It probably could do over 60 in another person's hands, but hey, I'm just not into the idea of seizing and destroying the only kit of it's kind in the US, so I'm pretty tame with it.....also, my desire to be at the top of the blasters has kind of waned. I just want be semi-reliable.