If I am not mistaken, the classic models use the older mounting system (the QL1), which I hear is not as good. The roller model seems even more involved to open and close. But if you use a handlebar bag (I don't), that might not be an issue.

Perhaps I gave mistakenly gave the impression that I wish I hadn't bought them. That's not the case. I am a little spoiled sinne my first set of panniers were Beckmans with hard sides, 3 horrizontal compression straps on each side of each pannier and an option for vertical compression straps so I was used to being able to snug everything down.

Wayne will certainly give you great service no matter what you end up buying. When I was having trouble adjusting the mounting system to work well with my racks, I sent him some photos and we talked on the phone. His suggestions were extremely helpful.