I've been using the Tornado for about a week now, and I'm pretty happy with the unit. Long battery life - I would say that is the best thing about it really. Other than that, everything is slightly better than the 510. I just ordered some low resistance attys, I'm guessing that will make everything even better.
BTW, does anyone know if it's safe to use my USB-pass
through for the 510 with the Tornado?