In the post I just wrote about investing in a photography business, I talked about the constant want/need to upgrade equipment. As a side note, I’d like to quickly talk about the upgrade process.
Upgrading is usually very expensive so I’d give you one piece of advice; if you aren’t producing beautiful images with your current camera, upgrading isn’t going to help. As I said in the comments of the post below, it’s hard to tell the difference between an image produced by a low-end camera versus a high-end camera if the user knows what they are doing. If you aren’t taking great pictures now, upgrading probably isn’t going to help.
The only thing nicer cameras give you is more flexibility. You can shoot faster and in different situations with a higher-end camera and this allows you to capture more great shots, but not necessarily better ones.