Now that I have my printer, next thing to invest in will be a really good camera. I borrowed one in Madrid and I went with a couple of friends to the Retiro park to snap some photos. I think it was a Canon 600D, and the difference in quality compared to my compact camera is huge!
It would also be great to have a really good camera to be able to snap art photos on my own. The resolution isn't good enough on a compact camera. I've heard from several sources that the best thing while shooting paintings is to use RAW format.