I'm replacing the tires on a 520 that I just bought used and I'm considering the Conti Gatorskin or Gator Hardshell. Most of my riding will be on pavement (90%) with some packed trails and some gravel. I do plan to do a 400 mile ride that is largely on crushed packed limestone. I'm looking at inn to inn touring and perhaps some fully loaded tours in the future. FYI, I'm about 220 lbs. I know that there are a lot of good tires out there but puncture resistance is a key priority. I'd also prefer folding beads. Are 700x32s a good fit for my needs? I know that Contis run narrow so 32s are probably 30s. Is that a problem? I currently run Conti 4000s tires on my road bike and I love them so I'm leaning heavily towards the Contis. I look forward to hearing from the experienced riders. Thank you.