Hey, I've been looking for a multi-purpose lens to upgrade to, I'm tired of constantly swapping between my kit 18-55, 50mm prime and 55-200. The lenses are pretty good but I think my photography skills have surpassed my equipment and it's time for an upgrade. I've been looking for a multi-purpose lens (~24-70 or so) that's fast enough for low-light events. I've been looking on ebay but everything I've found so far was for FX bodies, so I don't know how the cropping would work out. Any suggestions? Sorry for the terrible formatting, thanks!