Try looking at
www.redriverpaper.com. They have a sample pack of all the papers they carry, and you get your money back on first order. Any of the Polar line I highly recommend. The papers I currently use are: Polar Gloss, Polar Satin, Dourian Art ( pricey art matte but I love it), and River Linen. They carry many more papers in various weights but these are what I have settled on. Red River offers free profiles for the Canon i9900 for the top end papers and they work great. I also use third party ink from reinks.com, perfect color match with Canon inks. This is probably the easiest printer I've used to refill cartidges on.