@BCBG Max Azria is one of my favorite stores of all time, they have very chic clothes and they especially excel in making high waisted pants and shorts. I also suggest you go to @Ralph Lauren and @Balmain where they have high waisted pants and jumpsuits in their casual wear lines
@Ralph Lauren would be your obvious choice. For more of a surfer vibe, try @Hollister . Other good places are @Kingsley Heath or @Scotch & Soda . All these places have good polos for men