Its a nice shot, love the colours and the reflections. If I were to be hyper-critical I would suggest it needed a bit more room on the right (if poss) but otherwise its good.
As to upgrading, what a DSLR gives is, in most cases, better image quality and more options when conditions aren't perfect. It will also give you a hole in your bank account and a bad back from lugging all the kit about.
If you feel your current camera is holding you back then its probably time to make the move.
Cheers
Andy