Another advice this time about DSRL.Last several years I used Canon 10D,but I wanted to upgrade and my choice was Rebel 450D.I went to Best Buy and I spent some time there and play with camera.First impression was this is small camera compere to  10D,but I thought I can get used to it and I can afford it.Camera was with kit lens(EF-S !8-55mm) which is small and light.
After some time I bought   Rebel body only and I attached my EF 28-135mm lens which is bigger and heavier.Camera feel even smaller and  very unbalanced.I am not too happy but to buy 50d is too much.
My advice -try camera with lens You will buy or You already have.
Greetings,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,Wojtek