I absolutely love the 15mm f1.7 for everyday photos. It also did an admirable job for landscapes on my recent day in Zion NP. It's honestly my favorite lens out of my kit right now. However, I'd be lying if I said I didn't wish for a wider lens at times when using it. I Have the 9mm BCL, which I actually used quite successfully for several shots, but it's a bit dim and the corners are very poor quality when stretched for defishing. I honestly loved the results where it worked, though. It's WIDE! My 14-42 II kit zoom is good, but 14mm isn't really any wider than 15mm. So I guess I am realizing that I need a decent quality wider angle option. Keeping in mind that the 15mm is permanently cemented into my gear kit, what wide angle complement would you recommend? Just as some initial thoughts, I was hoping maybe swapping my p14-42 II for a 12-32 might work. Is that one solid at 12mm? Test sites are a little mixed on that one. I don't know if I can justify the $500-ish for a used 9-18 or 12mm f2 right now. Is 12mm even going to be wide enough to be worth it? Perhaps I should upgrade my 9mm to a 7.5mm samyang which should give me better defish results and 2.5 stops more light vs the BCL? Sorry for rambling, sometimes I use these to think aloud. Any feedback would be cool. Thanks.