I've been lurkin' about this PL25. I have to state that I got Panny 20mm, and pretty impressed with the IQ, but it's focus speed drives me nuts. You can say that it's not a fast lens and is perfect for landscape in low light, but when it's coming about taking photos of wifey and children, you can't hold them still for long, and that hunting for focus... My thought is, I found to sell my Panny 20 and 45-200 for the price that could let me to purchase a brand new PL25 (from B&H). Is it worth it the exchange? Keepin in mind that I have the fresh copy of Panny 100-300mm, just bought it. Or the second though would be to get a used Oly 75mm, with a bit of extra money I can get this one. Also I need to add that I got Oly 45mm. Your thoughts for a kingdom!