I tried Bambino's and they are very good diapers, they just cost a lot. About 20 bucks for 8 of them here in CA due to the sales tax and shipping.If you can order online, you might try bambinos. I haven't tried them myself, but I hear that they work well and have cute designs on them, so that seems like what you might want.
Other than that, depends max would be about the best you can buy in a store. With your waist size, I would go for the small/medium size.