Coin Cameras And Lighting

I use a Canon PowerShot A2500 camera to photograph my coins. It cost around $100 one or two years ago. Does a more expensive camera do a much better job of photographing coins? I've heard it said you need two light sources to properly photograph coins, but I don't have enough room in my tiny apartment to do that. Does it really matter? My coin photographs are pretty good, though I probably can't get good close-ups (like the L on the 1864-L cent) as a more expensive camera).