As many of you know, I've long been a fan of Ronson Jetlites because they're solid, reliable, and priced right.
Some friends turned me on to this site, which offers a huge range of lighters. These are the ones that I buy the dozen
http://dx.com/p/compact-1300-c-butane-jet-lighter-4179They are inexpensive, work almost every time, and will eat just about any butane you put into them. When they stop working, I dont care, I just toss them... they cost $2 shipped. I buy a dozen at a time. If I'm out at a cigar lounge and lose it, no worries. If somebody needs a lighter, I can hand him one to take home.
Not as fancy as a Dupont, of course, or even a Xikar. But for the price of a Dupont I can buy 75 of these and have money left over.