Mike I think you and Chip pointed out something I use in the back of my head when considering planers. I see it like this, if you want to handle glue ups then a planer at least the size of your jointer but not oversized (would be a 15" 4 post for most) along with a drum sander makes perfect sense. However if you want to take advantage of the ability to reduce milling time by running 2 or 3 boards at one time then segmented rollers are something I would consider mandatory, though depending on your stock it may not be needed every time. Bottom line if time is money a wide 20+ inch planer with segmented rollers is GREAT, if it is a hobby and money is not an issue get what you want, but I would rather have a 15" planer and a drum sander with good capacity than a 20" planer alone if money dictates a one or the other senario.