I can't decide between:

cod4

gtaiv

runner up:

mgs4

Im a watch out for (any order):

1. Little Big Planet

2. MGS4 (Own)

3. GTA IV (Own)

4. Resistance 2

5. Final Fantasy XIII

6. Rock Band 2 (Special Edition)

7. BioShock (For PS3)

8. SOCOM: Confrontation

9. MotorStorm 2

Anticipated PS3 exclusive (ONLY ON PS3)

1. Killzone 2

Runner-ups

Little Big Planet

Final Fantasy XIII

Resistance 2

1. Rock Band 2 (Special Edition)

2. Killzone 2

3. Little Big Planet