Budget? And do you need to stay with Canon i.e. do you already have lenses/flasguns tieing you into Canon.
Where are you struggling?
I moved from a 400D to a 50D. Its quite a big difference and the higher ISO is a lot better than the 400D. As for night photography, I can't comment though.
Thanks. My budget will be around £600. I do have two additional lenses Canon EF 28 - 135 IS USM and a Canon EF 75 - 300.
But I am not sure what other Canon camera's they would fit on.
I really struggle in low light even with my tripod. I just can't get the exposure right.
I really struggle in low light even with my tripod. I just can't get the exposure right.
Whats the trouble exactly? The 400D should be as capable as any at taking nice night-time shots - don't fool yourself that buying a new body will solve all your problems.
It really depends on what you're shooting, and where you are finding the limitations of what you got......

Whats the trouble exactly? The 400D should be as capable as any at taking nice night-time shots - don't fool yourself that buying a new body will solve all your problems.
It really depends on what you're shooting, and where you are finding the limitations of what you got......
Its not the camera, its your lenses. What lens(es) are you using, what are the light conditions your shooting in, are you using a tripod, hand held. If you using either the Canon EF 28-135 IS USM or Canon EF 75-300mm, then I can see why your struggling, a new camera body won't help, you'll need faster lenses and probably primes, not zooms.