Xikar 007,008 or 009 Cutter Opinions

I have the 008 and I love it. I use it about 1/4 of the time (I also have a palio and v-cutter). The hole is a fairly large and I do believe they sharpen themselves when they close. The key ring keeps you from loosing it and although its a two piece you use the second part of the cutter to eject the plug as you close it. I picked this over the 009 because the gauge of the hole was large, other than that I like the one piece design of the 009.