I'd buy the FL that mkaes sense consdering my other lenses WAY before another that fits less well that has a few more lpmm in the extreme corners. The 28 may not be as strong as the 25 on paper, but dont go thinking you will see it on a print, because at 20x16 from Delta 100, I cant. Well, thats comparing the 28 with the 35 biogon or 21 2.8 (which has an almost identical MTF to teh 25). For goodness sake, don't get a 25, when you would prefer the 28mm FL, just because the 25 is 'sharper'. Thats just plain daft. Nobody is going to wow over the tiny differences in performance with the 25 over the 28. They'll wow over good photos.