There's nothing wrong with the Panny 20mm; this isn't about which lens is better, really, but about which one fits which user. I prefer the Oly 17mm. I like the wider aov, and I really, really prefer the smaller size and lighter weight. I'm sure there are going to be situations where I'll want the 20mm and that extra stop, but for now, for me, I think the Oly17 is the hot ticket, not the Panny20. Who else agrees, the 17mm is the one that fits their style better?