I'm in quite good shape, but no matter how lean I seem to get, I will always have what I would call thunder thighs. I'm not a fan, but that's the hand my genetics dealt me. Consequently, it seems like every pair of underwear I've tried except for a few (some of which now discontinued) ride up on me in a pretty bad way. I've found that very long legs tend to ride up less than a standard "boxer brief" fits, and I am not a fan of briefs or plain boxers. Also I'm not going commando. I don't think I'd terribly like a "trunk" either, but the thought occurs that it might ride up less because it doesn't cover too much leg? The underwear that have previously fit me best in the past were CK Cycle Shorts, which they no longer make. I recently got a pair of underamor 6" inseem that rode up and curled up worse than anything I've ever dealt with, and a 9" inseem that doesn't ride up all that much, but the support is sort of lacking, and contrary to the idea of keeping things "cool" the waistband seems to create a ring of sweat around where it touches. Any ideas?