I received the K10D from B&H and right out of the box I'm well pleased with this camera. I still have the ist DS and will continue to keep it as a backup for weddings and other events. So far, I can't say enough good things about this. I bought it w/ the optional battery grip, extra battery and right now B&H has the camera body and 2gb card for $859...can't go wrong there. The features are outstanding. I was a little nervous about it being larger, b/c the DS just feels right in my hand, but with very little effort, the k10D easily becomes an extension of your hand. The weather sealing and the metal frame give it a very substantial feel and makes you feel you got your money's worth. I was pleased that they added another wheel so that you can control aperture and shutter speed independently since the DS. I did notice that the thumb wheel on the battery grip is just a bit too much recessed for my liking though. I was holding my breath regarding the anti-shake, but it doesn't disappoint. It definately makes a large improvement in the ability to hand hold a shot and retain sharpness and clarity. I was also a little nervous that there would be enough difference between the ds and k10d that there would be a bit of a learning curve in adjusting settings, but it seems that many things are right where you expect them. I was also pleased that it's features more closely resemble the ist 35mm. One thing I did notice is that there is VERY little play in the shutter release button and it is very sensitive. I was used to the DS which has a very distinct 1/2 position to activate the auto-focus, not so with the k10d which I kind of like with the DS. Nice to have both RAW and DNG format as well as RAW+JPEG features. Image quality is excellent, though I don't have a good comparison to post as much of tonight was spent with charging batteries and finding my way around. I will be attempting some senior portraits this weekend and should have some comparison then regarding image quality. Summary, if you are already invested in the Pentax line, go out and get this camera when you decide to upgrade...it's a no brainer. I would recommend the battery grip as well as it makes portraits much more friendly and comfortable. If you aren't vested in any particular brand yet, give the k10d serious consideration. I think it will really give canon and nikon a run for their money.