I would go with the D80 and the 18-200VR. With both lenses, you'll probably find yourself constantly switching. The 18-200 is wide enough, and has plenty of zoom to really go far. You'll be much happier not having to switch as often. In my opinion, the Nikon has the nicest bodies..
THE Brandon Paith and his Nikon D80...
I would buy the Canon 450D because it has higher image quality. Check out images in the respective reviews...
The D80 is a higher model. If you are considering that, then consider the 40D or a discontinued 30D..
If you are looking to purchase at that level, then consider a K20D, which is more like a D300 but a lot less. Or the K200D. The built in AS means you can buy the better lenses for less and have them all stabilized...
Do not buy either camera.Instead go into a camera shop and pick up a few camerasplay with them and see what feels best in your handsand what menus feel most intuitive to you.Any good camera store will be pleased to oblige you.There is no bad product from any of the major manufacturers these daysSo at the price point you are looking at it is very much what feels best to you..
Do remember though that the whole point of a DSLR is that lenses are interchangeablethe right lens for the right situationlandscapes,portraits,sports,macro,tele etc.If you are not prepared to change lenses then you would be better off with a top end Bridge camera that will give you 10 or 12X zoom in a single body.With a DSLR system you are always looking to your next lens investment and the accompanying collection of different sized kit bags to handle them..
Above all though get a body that feels comfortable and balanced in your handsIf it's not.then the chances are you will fudge the shot.Photography unless you are a pro is a hobbyits about you and what you want to shoot and it's meant to be fun.Good luck and enjoy.PJT..
Well said PJT!.
For the OP: If you really want to check out stats and specifications, turn yourself to the lenses instead. I find the difference in the quality of lenses much more critical than that of the camera bodies..
Consider buying Pentax for good kit-lenses or Nikon or Canon for good prosumer's..
Photozone.de is a good place to start!..