Have been using Epson Glossy Photo Paper, 9.4 mil, for some time on my Epson 925. CostCo was selling 120 sheet for about $20, but I recently tried to buy more and they were out of stock. In it's place was CostCo's brand, Kirkland Premium Glossy Photo Paper, 125 sheets packed in a heavy duty box, for $18 and change. It's 10 mil in weight compared to Epson's Premium Glossy as 10.4 mil. They guarantee satisfaction or your money back, so I tried it. Absolutely wonderful results.....so good, in fact, I wouldn't be surprised if Epson was making it for them. The color renditions show no difference from Epson's own papers. At about $.15 per sheet for premium 10.4 mil paper, it's a real bargain.
Mike