I always like the hardback Moleskines, but hated the yellow paper. Even their sketchbooks with the thicker sheets had yellow paper.
Years ago I switched to Leuchtturm1917 sketchbooks. At the time, they were incredibly hard to find in the U.S. so I ordered them from Amazon's German site. Fortunately, you can find them easier on Amazon.com now and they have a U.S. store too.
Their sketchbooks have nice, thick, white pages. They also produce some yellow page variants like Moleskines. Ruled and Dot Grid books. They come in various colored hardbacks.