I tend to dive cold. I dove Hawaii and Bonaire with a 5mm hyperstretch and was really comfortable temperature-wise. I'm going to Yap and Palau in a week, and the water temperatures look a few (~4-5) degrees warmer than what I've dived before. Should I stick with my 5mm hyperstretch, or go down to a 3mm? My LDS advised towards the latter, but I'm curious what other people who dive cold think. Thanks!