Sooooo many good choices. I'd say my top 5 new discs are in any order:
Latitude 64 Blitz - Amazing disc.
R-Pro Boss - Too weak for Champ
Discraft Stalker - Great for everything including getting run over by 6 vehicles and still flying correctly.
Latitude 64 Striker - Wow goes a long way right on target
Discraft Focus - Great ESP version to compliment my Wizards