I've heard recently that high MP cameras (I believe Sony just announced a 25MP sensor) can have serious drawbacks because the actual size of the pixels on the sensor are so small. Some examples were that smaller pixels create noisier shots due to less light sensitivity and also tend to create soft images. Does anyone know about this? Also what is a good guide for print sizes that a certain # of MP's can support? I have 2 16x20's that were shot with a 5MP P&S and I struggle to find any flaws.