I do not have the DP1 or DP2, although I hope to get a DP2 sometime soon, but I have a Sigma SD10, and I also have a Contax G2 and Fuji 645, and Voigtlander R2 and 35 1.7.... And so, with that out of the way: First, it is utter madness to try to work from jpgs on the DP cameras, or use a non-Sigma RAW processor, as it defeats the purpose of the cameras, which is exquisite image quality. Second, learn to use SPP. It is imperfect, as is everything in life, even the programs you already know how to use, but it is not a step back in time. Use the auto function and see if you like the result, then do what you have to do. It's easy and it's free. After you learn to use SPP perhaps another image editor will work, but why struggle? SPP is not a "creative" image editor, although the "fill light" function, with positive and negative application on RAW files, can work an occasional miracle. From my time on the Sigma forum and my own experience in processing Sigma images I can say that almost all Sigma shots are extremely well, if not best, processed by SPP, and the next step is to finish the work in the image editor of your choice, if you feel that is necessary. On various Sigma forums there have been problems reported with blown high-lights in SPP 3.5, which may have been corrected in 3.5.1, but it is an SPP problem not a camera issue, and I believe it can be resolved by exposure corrections in SPP. And maybe the camera and SPP will force a change in work-flow? Would that be so bad? Are we dedicated to process or results? The good news and bad news is that the DP1 has essentially the same sensor as the SD10, which is still competitive with most high end DSLRs in terms of image. We should expect the DP2 to do well, and it does. Is it a point and shoot? No. It is way better than that.