I'd buy a 4e if it looked less like 4e and more like the current d20Modern with the following incorporated:
- more Occupations and have them provide a few bonus ranks (like Modern20)
- more talent trees and some tweaks to the existing talents
- more skill points
- fixes automatic weapon fire
- Action Points work like M&M Hero Points
- Blood and Fists martial arts and ki fx
- Psychic Handbook for fx Mental Powers
- Elements of Magic: Mythic Earth for magic fx
- Foe Factory: Modern for GM ease of NPCs
- Hot Pursuit style chase mechanics
- Star Wars Condition Track or M&M Damage like Save.
- Limited 4e influence to the following
---- 4e unified save progression
---- Save as Defense
---- Skill challenges
- more Occupations and have them provide a few bonus ranks (like Modern20)
- more talent trees and some tweaks to the existing talents
- more skill points
- fixes automatic weapon fire
- Action Points work like M&M Hero Points
- Blood and Fists martial arts and ki fx
- Psychic Handbook for fx Mental Powers
- Elements of Magic: Mythic Earth for magic fx
- Foe Factory: Modern for GM ease of NPCs
- Hot Pursuit style chase mechanics
- Star Wars Condition Track or M&M Damage like Save.
- Limited 4e influence to the following
---- 4e unified save progression
---- Save as Defense
---- Skill challenges