I just picked up the 24" x 18" Itoya Profolio Evolution recently, and it really suits my needs. It's archival safe, has acid free backing paper, has 24 sleeves, and is relatively cheap at around $30-40. I can't recommend it enough. The cover is a bit flimsy and may wear out in time with heavy use though. Plus you can't buy polyglass pages to refill it. If you want that option you'd best look at the higher quality, pricier binders from Pratt. Here's the Itoya with my Kris Anka WW art print. I've had her rolled for more than a month and weighted down for over a week, but there is still a bit of a curve to it. I love how vibrant the print turned out! Plus I'm a fan of Kris' art style as well.
But I must say that I am really disappointed that SS didn't make the dimensions for framed prints for the Trinity the same at roughly 30"x24".
