As a scroll saw instructor, I start my begginer students off with Olson #5 skip tooth blades. They are a good over all blade to learn on. once they progress through the class we move on to reverse tooth blades. For new students Olson blades are less agresive than Flying Dutchman blades.
Personally, I use Flying Dutchman Ultra Reverse blades. They are an agressive blade, but suite my style. I stock FD UR blades in sizes of 1, 3, 5, 7 and 9. They do not come in 2/0 but I use a lot of 2/0 blades. I haven't found an FD 2/0 blade that works for me, so I use Olson Skip Tooth 2/0 blades.
I also stock FD New Spiral blades in various sizes for portraits and I use FD Polar 3, 5 and 7 blades for compound cutting. For zig saw puzzles, I use Olson 2/0 blades.
P.S. I buy my FD blades from Mike, www.mikesworkshop.com, and Olson blade at Sloans, www.sloanswoodshop.com. You can mix and match any size of the same type to make a gross.