The discmania FD will be similar to your Leo3 if not a little more over-stable. Roc3s and Mako3s make a good pairing. Try looking at the MVP Relay for easy distance and nice stable flight. But again, that will also be similar to your Leo3. If you like the champ Leo3 but find it has a bit more fade than you want, try a gstar Leo3.
Good luck and keep throwing! You'll figure it out. Some of us who have been playing for a while, like to buy lots of discs to build our knowledge base on how things fly. It's a hobby. You'll be best served on building your throw around as few molds as possible until your form is relatively solid. Then start branching out. One of the things I learned along the way is, there are no magic bullets. Once you get your Leo3 and your Roc figured out, then go back to the Tern and see what happens. Always do your field work and ask yourself, is the distance you gain from throwing a Tern that much more? Or only just a little more. Is it worth it? That's my 2 cents. Oh, and sell those Grooves. Good luck with that.
