Looking for advice on which program is best for decent photo editing (resizing, sharpening, adjusting hues/contrast/etc)....Not particularly a fan of iPhoto's organization method but want something that's easy to use and retina-friendly (mid-2014 rMBP). I have my pics in folders under my main picture folder, if that gives any insight into my organization (or lack thereof). I do zero graphics creation - it's all post-processing of photos. Thanks.