I have just bought a GF5 (body) as a backup of the GX7 and actually I want also to use it as my everywhere camera. I need to buy a lens and since I am currently short of money, I am looking at Sigma products which might meet my needs. I basically shot street/city stills and some landscape ones. I am torn between the 19mm f/2.8 and the 30mm f/2.8. The GX7 comes with the kit 14-42 but for the moment I do not want to switch lenses, meaning I am looking for something to keep always (so far) on the GF5. I think the 30mm should be more versatile for what I need but I am kinda newbie here and I would like to listen to your thoughts... Thanks.