Wasn't the Grendel available just last fall? I'm surprised so many people still need it.
I went with the O-Bakemono because I don't have one, and I don't think it's ever been in the ASR pool before, but I wouldn't say no to a spare Typhoon or APC either. O0
Edit:
Wow. I looked it up, and it looks like last time Grendel was in 2011. I must be getting old. Carry on, Grendel voters!