In terms of butane durability and performance, the IM Corona Old Boy is the way to go. It's a "buy once cry once" proposition. They're phenomenal lighters. I've had mine for close to 18 years now and it's a tank. That said, a lot of depends on where you're going to be smoking. If you're smoking a lot outdoors, you simply cannot beat a Zippo for outdoor smoking. The Old Boy just doesn't do wind well at all. Are you going to be traveling in your vehicle and smoking? My Old Boy does not leave my house. Its too darned expensive (and I bought mine back when they were $90) to risk losing. If money isn't an issue for you, then disregard that and take it wherever you go. Lighters just have a tendency to "walk off" if you know what I mean.
Think of it more as a tool for the job. My Zippo goes with me in the truck, on the jet, on the hiking trail, on a walk. My Old Boy stays home for when I smoke indoors or in my garage.
I'd get an Old Boy & a Zippo and be done with it.