I haven't seen Infinite Stratos but would like to give it a shot. Anything Gundam-esque usually grabs my attention (I'm a Gundam Wing guy... first Gundam series I watched, so I'm biased. Go Heero!)

I have watched Ga Rei Zero, but that was months ago, so I can't remember too many details about it. I do remember that it was definitely bloody (nothing I've seen really compares to Elfen Lied) and I did enjoy the story as well.

Well done on the reviews!