The number of "oscars" depends on the idea if this would likely be a joke or serious.
If you want the awards to be serious then you simply make a selection:
1. Large orchestral piece of the year
2. Chamber orchestral piece of the year
3. Concerto of the year
4. Wind-Brass orchestral piece of the year
5. Chamber composition with strings of the year
6. Chamber composition with winds of the year
7. Chamber composition with brass of the year
8. Chamber composition with percussion of the year
9. Chamber composition with mixed cast of the year
10. Keyboard solo composition of the year
11. Any solo instrument composition of the year
12. Choral composition of the year
13. Vocal composition of the year (solo voice, duo, trio, quartet, up to eight singers with accompaniment or without)
14. Operatic composition of the year (I personally doubt there is one though)
15. Ballet composition of the year
There should be a special award for most improved composer in 2012, "noob" of the year (joined in 2012), maybe a special prize for life achievement (for a member who joined in 2007 or earlier, at least five years of being here).