That second picture I linked is definitely not as good. However, it was the only I had that wasn't friends or somebody's apt. etc. Unfortunately it was a bit underexposed, with no tripod, and there was essentially no proper lighting on the trees - colours are washed out. Lighting is key, because with the digital cameras it's a killer.
Don't get me wrong... I think the D30 is an awesome camera, but I think for your purposes, that camera is waaaaaay overkill. With the proper setup and lighting something like a Coolpix 990 and Olympus 3030 could have come at least extremely close at this resolution. You probably won't really start noticing the difference until you start printing the pictures, when you need the full 2160x1440 (or 2048x1536) image size. Basically, what I'm saying is the small pictures you see on the net don't do the D30 justice.
For my camera, my 3 MP image gives me a resolution of 180 ppi for 8x12 prints. My local shop recommends 200 to 400 ppi for top notch quality. Most people on the net seem to think that quality maxes out around 250-300 ppi for most purposes, though. At 250 ppi for an 8x12 print, that is 2000x3000, or 6 Megapixels. :Q
It sounds like image quality IS more important to you than I originally thought. So, I'd advise against the Olympus you were talking about, and stick with 3 MP, unless you really, really want that 10X zoom.
Edit for message below:
CF does not have pins. It has a female connector. The male end is in the camera.
One pic below that IS extremely telling is #4. Many consumer level cameras have trouble with the low light shots. Get a starry sky effect from noise.