I posted some of this on another guy's thread, but didn't want to hijack it looking for my own answers.
I've sort of made my decision for Nikon vs Canon, but now I am having a tough time between Nikon's products:
Personally, I like the D70s. D70s has a few more options than the D50, and the s supposedly has the better imaging like the D50 does. I like the D40's larger screen, and I doubt I would ever buy a used lens, but I don't like spending the same amount for the SAME product. The D40 also has one less screen than the D50 or Canon, it's missing the LCD on top, but people that use it tell me it's almost BETTER because they can get those graphics on the main screen now, instead of flipping back and forth. I'm of two minds on it.
Here are some numbers:
D70s body for only $465.00
http://www.stop4camera.com/Shop/Product.asp?sku=d70sb
D40 body for only $384.00
http://www.preferredphoto.com/product.asp?id=nkd40
D50 body for only $425.00
http://www.stop4camera.com/Shop/Product.asp?sku=d50
The prices are so close, I don't know what to do.
EDIT: Didn't realize the D70s was much older than the D50. That sort of makes it easier, since the D50 has newer optics.
However the decision between D50 and D40 doesn't get easier with the chart here:
http://www.dpreview.com/reviews/nikond40/
COMPARISON OF THE D50 and D40:
http://www.dpreview.com/reviews/nikond40/page22.asp