1. MPT
2. GoW
3. GTA
For me Metroid Prime Trilogy is like Super Mario Allstars or Zelda: Collector's Edition. A package filled with so much awsomeness I have to cry.
GoW Collection is a fine deal as well, with two remastered games and the GoWIII demo. I never was much of a GoW fan but I might get it just to play through GoWII and try GoWIII.
I have never been much of a GTA fan so for me GTA is a distant third.