I have been searching for months now for my first dslr! I thought i had finally narrowed it down the Rebel xs, but then i found out that i could still get a Nikon d40. Any advice on either? I need to stay under 500 dollars and the d40 seems like a cheaper option. i would like fully manual settings on whatever one i purchase as that is my reason for upgrading. I mainly shoot low light, landscapes, including nautical, and macro. Thanks for any help.