Thanks so much for the input. What lens should I get if I go with the d90? Don't want any distortion that I've seen with some wide angles. I am willing to invest in a good lense. (I broke my camera today due to a lousy tripod. So the add-ons are very important I know!)
I think the D90 comes with an 18-105mm VR lens. This gives you both wide and telephoto range. VR stands for Vibration Reduction and it will help you out in low light situations to prevent camera shake. I think the kit lens should cover most of your needs, and the Nikon kit lenses tend to be pretty good. I've got a D40 with an 18-55mm kit lens, and when I'm zoomed out to 18mm there isn't much distortion at all. If there is a tiny bit you can easily correct it in post processing. But 18mm is wide enough to get most normal shots but not too wide as to distort things.
Check out this
page where Gordon has done distortion tests on similar lenses. It will show you roughly what to expect out of your lens as far as quality goes too.
The good thing about the D90 is that you can buy a kit package which is bundled with a cheap but decent lens. I think that's the best route to take for what you're going to be doing. You may find that you don't even need to buy another lens, as 18-105 or 18-135 gives you quite a bit of flexibility.
But as others have mentioned if you don't need a high res image (most people don't) then take a look at the D40. It's probably fine for what you're doing. You can save some money on features that you wouldn't use by buying a D40.