The P100 takes acceptable photos.
Not excellent but not bad either.
You can improve your photo quality by not using digital zoom.
I don't know of any DSLR camera that has digital zoom.
Digital zoom is a crutch and it degrades the image.
One of the purposes of DSLR cameras is that if you want to get a closer shot you change lenses.
The Nikon D90 is an excellent choice.
I currently have a Nikon Coolpix P100 that I use mainly for taking pictures of High School sports. I would like to upgrade to a camera with nicer photo quality and one that deals with the extremes of lighting better. The D90 by Nikon sounds like it would be a good fit, but I was wondering if there was anyone out there that takes action shots like I do that could suggest something else. Also, do any of the digital SLRs offer digital zoom?