I currently have the 17/75 combo and part of the appeal of these lenses is the excellent build quality. I'm starting to lean towards saving up for these quality built items. I was thinking the 45mm 1.8 would be awesome if they actually made a metal barrel version of that lens. I'd actually pay extra for it! In fact I wouldn't mind Olympus building everything in metal: metal EVFs, metal grips, even metal zoom lenses! What do you guys think? Would you pay a premium for higher build quality?