You asked the right question about fuel. The reason why torch lighters seem to "die" after a while isn't because they break, but because they get clogged with soot build-up from dirty butane fuel.
Most butane refills that you get aren't very well filtered and contain lots of contaminants that turn to soot and clog your lighters up. This happens from the cheap-o gas station lighters to your highest end Dunhills. (I've killed quite a few torch lighters myself until I was shown the light.)
Probably the best lighter butane fuel you can get is Vector butane, which has been filtered 5x compared to the regular stuff you get in cigar shops that have been filtered 2-3x, or the drugstore/supermarket junk.
Use the the right refills and you will notice less soot build-up and longer-life of your torch lighters.
As for which lighter, Windmill is great as well as the Thunderbird insert for the Zippo.