Sorry, nothing more than unit rewards... No questions about cost, upgrade time, etc.
Level 1 - B-12 Skybolt (A) - 595/396
Level 2 - Juggernaut Assault (G) - 529/792
Level 3 -Arctic Sub Laboratory (S) - 908/908
Level 4 - Laboratory Response Unit (I) - 1,362/1,114
Level 5 - XA-180EST (G) - 1,486/1,816
Level 6 - Tower Machine Gunner (I) - 2,147/2,146
Level 7 - Tactical Retrieval Chopter (A) - 2,997/2,451
Level 8 - Patton MTB (G) - 4,062/2,707
Level 9 - Classified Scientist (I) - 3,302/4,953
Level 10 - Fulcrum Mig-29 (A) - 9,081/7,429