I bought a Canon 10D used a couple of years ago and although it takes great pictures and it's easy to use, I find I don't use it that much because it is so cumbersome and heavy. I would like to be able to sell it and get something as light and small as possible, while still sticking with an SLR. I'm looking to buy used to keep the cost down, I would like to stay under $400 body and lens. I've been looking at the Canon Rebel XS, Pentax K100D (I heard that the Pentax lenses are usually more light weight?) but I'm open to any brand since I'm going to probably sell off the lenses I have anyway. I also see some of the Olympus cameras are pretty light but got mixed reviews. Any recommendations?