I'm currently looking for the same thing. I just stopped by a local Ritz to see the k100d and the e510 just to see how they felt and such. I'm completely new to photography and before I went, based on reading online solely, I had my mind pretty set on one but now that I've held both of them I'm favoring the other one. It is definitely in your best interest to just stop by the store and look. You can probably take a card with you if you have one and save some pictures with each.