Hi, I own a Sony DSC-R1, with a 14-71mm equivalent f/2.8-f/4.3 lens, wich I'm very happy with, but its time to go for a better camera. Since I can't afford for a better one, my decision was the Sony Alpha 300 (I won't change my mind, folks, its a final decision, so please don't go off topic discussing other cameras). As you may know, the Sony DSC-R1 fixed lens is one of the most expensive lens produced by Sony (Carl Zeiss T*). When the Sony DSC-R1 was launched the cost of the lens alone was $999 (the price of the camera). This was even stated by dpreview.com My question is: Can a Sigma 17-70mm f/2.8-f/4.5 lens on a Sony Alpha 300 compete with the lens of the Sony DSC-R1? I know this CCD (BIONZ) is better than the DSC-R1's one (wich is also an APS-Class sensor), but the question is if with that Sigma lens the A300 will produce better image quality than the DSC-R1. Thanks a tone. I really need to know this.