I have been comtemplanting this one or the FA 43 f/1.9 but after seing thousands of images from both lens, reading hundreds of threads in several forums, I´m settled to order the DA and I really believe it is the most underrated Limited of the all bunch. For the price it delivers stellar images, corner to corner and considering the size... it is probably the best pancake still in production.
This lens is the equivalent of the K200D in the camera section... the other most underrated piece of equipment in Pentax line-up. For the price a little gem and no other brand has the equivalent to the k200D in the same price range.
Still, I´m going to get (still not 100% sure about this) the even smaller K-m that coupled with the DA 40 might even beaten the Olympus compact option (E420 + Pancanke)... I know it does in terms of IQ