WSD designs aren't just for small women - even us bigger ones sometimes can benefit from WSD. You're self-described long legs makes you an ideal candidate. WSD takes into account that 'in general' women tend to have longer legs and shorter torsos, compared to a man of the exact same height. So, you might benefit from one, but you can only tell by getting a pro fit. I have two WSD that I loved, but without a hitch switched to a standard (albeit compact) geometry a few months ago, and they both fit well.