The best thing is to go and have a hands-on feel about the
cameras that you have shortlisted.
YOu may like to visit www.dpreview.com or clubsnap.com for some
comprehensive review. The 2 things I don't like about the D5000
is
1.the way the screen is pivoted. if u use a tripod, it gets in
the way.It is just not articulated enough
2.Liveview is a tad slow compared to the rest of the same level
cameras.
Other that that. I like the solid Nikon build and it takes
stunning pictures & good noise control.
Canon are good as well but it feels like a toy , pics are not as
accurate and the AF points are too closed apart.
Just make sure that whichever you choose, you will be happy with
it for a long long time.
Happy Hunting.