how much for that lens you're talking about bro? issit meant for both models?
I think he is referring to Canon lens. You may get a official price list from the canon.com.sg website.
Jsut to share with you my experience of choosing between the 400D and D80.
I bought a Nikon SLR (F series) 15 years ago camera and it is still working. I did't get any extra lens and speedlight as budget not allowed. the camera gives superb image and the focus is fast. Nikon was always my first choise, but the price is on the high side. I stopped this hobby until I decided to buy a digital SLR last year christmas.
Since I basically had noting to start with, I can choose from the two brands. At first, D80 was my top choise becasue it is Nikon. But I finally get 400D becasue it is cheaper, and i can use the extra money for other accessories, like speedlight, which is a must, if you serious about this hobby.
To me, the other reason I choose Canon is that Canon is adhead of Nikon in digital field for a very long years. And also, the WHITE lens from Canon is very attractive. For your information, based on what I know, Canon provides a wider range of lens than Nikon, and Canon generally has bigger apperture on the range of their lens, good for potrait. Not sure if I am right here but i saw if from one of the articles. But those white lens, or they call it "L" lens are very expensive.
To me, the dslr has come this far that you can't bother so much for what the features and qualities from the different brand. after all, soon after you get your new camera, the new models will appear offering better features and qualities. I think you can take my word, they are both as good. It really depends how far you want to go about this hobby.
Between this two, I would say that D80 is slightly (emphasised) better for the price that you are paying. But you are paying for more, of course. One thing I like about D80 is that it is solit on my hand, i mean the bigger grip. Some think that it is important. 400D is very small comparing to that. but image quality wise, they are both as good. Note, it is not a good camera that produces the good picture, it is the photographer.
But as I said, I can get other accessories, like extra battery, verticle grip, speedlight, IR remote control, extra cheap plastic 50mm f1.8 prime lens, etc, by paying less for 400D. If you have a budget like me, what I did may not be a bad idea. Among the accessories, I think the speedlight is very important. But I only get the third party speedlight to start with.
For your information, both nikon and canon does not have the stabilisation feature on the camera body, which i sometime find it is necessary. if this feature is important to you, you may want to consider sony A100. If you are getting a canon or nikon, consider getting a lens with IS(Canon) or VR(Nikon) feature if possible.