Thanks for posting the pictures. Can't wait! I also thought it was a twist off cap and got excited. Something about the picture makes it look like it is a metal twist off cap. I think the bottle would look great with a twist off. There were a lot of great bourbons in the past with metal twist off caps, like Old Taylor or Old Grandad. Metal cap or not, at the end of the day it's what's in side that counts.
Okay, that said, what is everyone's favorite cap??? (Yes, I agree, it IS what's inside that matters but estetics are nice).
Mine is the heavy "Pewter" cork in Kentucky Spirit.