For me its about Duties. I do have a couple discs that cover the same duty but are different discs/brands. But I only carry 1 of them at a time, because its redundant to carry both. So what are you looking for? Basically sounds like a fast Slightly Overstable disc is the slot/duty you have going on. Force and Outlaw are both fast and OS. I narrow it down, in a given speed category, ie: 5, 7, 10, 12, etc.....I usually carry 3-4 discs. Understable, Stable, Slightly OS, Overstable....I narrow it by trial and error, see what I like, and go from there. Again, all depends on the duty you're looking for.