First time posting. I have been browsing around the interwebs to find out which slow cooker I want to get. It is for my wedding registry. What is the "Top of the Line" in slow cookers? We are registered at Williams Sonoma, Crate and Barrel, Amazon, and Bed Bath and Beyond, so pretty much ANY manufacturer will be at one of those places? Suggestions? I have read Cook's Illustrated and they like the All Clad, but I have also read bad things about it... and then they even have two models, the ceramic one (which I have heard stories of the liner cracking, and the aluminum one. Any thoughts?