Don't buy Gatorskins. They're aren't as bad as some people make them out to be, but they are far from good. According to the rolling resistance site, the race tires on my XC mtb have less measured rolling resistance than Gatorskins. There are plenty of gravel options that will offer good puncture resistance along with more efficiency...also most road options will be better, if you go tubeless. Since going tubeless with gp5000 on my road bike, any sort of pressure-losing event during the ride, is exceedingly rare.