Whatever your looking for these days we are spoilt for choice. There are loads of cameras, lenses and bags to carry it all in. But (you knew there was a but coming) when you get down to it most choices are a compromise.
I used to think of investing as getting a return on money spent on something. Shares are the most obvious, you invest money in the shares you think are going to give you a good return. Risk also comes into it. Generally the better returns are had on the riskier investments with a smaller return on the somewhat safer trades.