I played a LOT of the first Armored Core game on the PSX, as well as a little Master of Arena and Project Phantasma, but ever since the PS2 launch, the only one I've played is Armored Core 2, and that one I purchased the Japanese version of (I bought the Japanese PS2 on its launch day - I used to be crazy like that).

I have fond memories of these games and want to get back into it. With CGE coming up, my "post-CGE vacation" is coming as well. So what can you tell me about these games? What makes each one unique? Which is your favorite? Are there any duds here?

Armored Core 2
Armored Core 2: Another Age
Armored Core 3
Armored Core: Nexus
Armored Core: Silent Line