Any reason to choose the 17/2.8 or the 14/2.5 for my future E-M5? I've owned the 17mm previously, and found it to be a solid if not spectacular lens, maybe a bit under-appreciated. All things being equal I'll go with the wider Panny; just looking for some opinions. Lens line up will be the 12-50; 45/1.8; 20/1.7 or 25/1.4; and the 17 or 14. If I go with the 20 I will go with the 14, but I am leaning hard toward the 25/1.4 at the moment. Any comments on those two would be appreciated as well! Thanks.