Thank you for this thread, Laura!
I used Shutterfly several years ago for both prints and photobooks. I was not happy with the colors at all. Since then, I've been using Blurb for books and Persnickety for prints. I have various sizes of different projects and I am happy with them all! (Blurb's standard paper weight is a bit light but I'm too cheap to pay for the premium option! I settle, and it works well for my purposes.) Blurb always cuts less off the margins than their template indicates; Persnickety, though, does the best at saving the edges!
I'd love to find a quality, affordable company that offers 10x10 books... the perfect size! I need to research some of the options listed above (many are new to me).