Here are links to the reviews you are looking for. We're having some issues with out-of-production products and the new review system. But we have reviews for pretty much everything.

Canon EOS D30: http://www.photographyreview.com/sf-...eviewscrx.aspx

Canon EOS D60: http://www.photographyreview.com/sf-...eviewscrx.aspx

Nikon D100: http://www.photographyreview.com/sf-...eviewscrx.aspx

I say, go with the system you'd most like to invest in for the long term.