Greetings Nils,
I have owned a Canon i9900 for 2+ years and originally I used Canon's Photo Paper Pro. Good stuff but I got tired of dealing with their packaging. I then switched to Epson's Premium Glossy Photo Paper. It's about the same cost, produces comparable results but I could get it in 20 sheet packs. I am an event photographer who has to carry all this stuff around so the less packaging the better. However, about a year ago I read a comparison of the various glossy papers in the Photoshop User magazine and they rated the Kokopelli 260 Glossy from Moab Paper as the best. I ordered some and the stuff is great. Smoother paper, colors pop and the paper is ready to handle as it leaves the printer. The prints look better than the ones on Canon and Epson's papers and while the Kokopelli is a slightly lighter paper, it's perfectly acceptable for my needs. An added benefit to me is that it comes in 50 sheet packs. Go to
www.moabpaper.com and check it out. There is a supplier in Europe so you don't need to pay shipping from the states. A 50 sheet box of A3+ is about 70 euros so it's comparable to what I pay here.
Enjoy!