Those swimsuits with the lining have their charms. But now vacay season is finally upon us, and it may be time to update your poolside look. Whether you're hitting the golden sands in Europe or keeping things local in the Hamptons, there's an abundance of handsome swimwear options for you to choose from this season. But before you make the all-important decision between modest board shorts and their barely there cousin the Speedo, we've rounded up a squad of beach-ready celebs in their swimmers to help you choose how much flesh to flash this summer. Take a look…