For me, it varies on the cigar size and strength. . . who said that?
However, the Punch seems to be the most popular for me.
While I (personally) don't care for a V cut, XiKar has a great tool and Colibri also came out with a good one.
FWIW:
I designed a 4-blade Punch Cutter. Looking for a manufacturer now. It's really tiny! Like the size of a AA battery with a twisty cap thing. Probably need to find a watch maker to build the prototype. But, if it works, it will be the best punch cutter yet. Sizes? Ok: 6-mm, 8-mm, 10-mm and 12-mm diameter holes. What's your hole size?