Xikar 007,008 or 009 Cutter Opinions

I have the 007 and it works great. The first one i bought I put on my keychain, but it would open on it's own and the blade got ruined. with the lifetime warranty, I sent it back for "sharpening" but they sent me a new one that stays closed better than the first one did. I haven't used the others, but +1 for the 007.

I also have a Xikar Xi2, a Palio, and a Xikar Mean Sardine. I use them all about the same amount.