Arkel make waterproof panniers that weigh and cost the same as Ortlieb. Putting them on and off the rack is a one-handed operation. The big handlebar bag has two closed pockets and two mesh.

I use non-waterproof pannier and it isn't a hassle. Only one needs waterproofing using a garbage bag and when it ventilates when it's nice out. My stuff doen't get wet when I ride, it gets wet when I use/wear it.