RE: neoprene vs canvas
Neoprene is the best thing to happen to waders. There's been way fewer deaths from drowning since neoprene came on the scene. Just make sure you get the right weight (3ml, 4ml, 5ml, ect.) for the activity. 3 ml stocking foot take a bit more time to get into, but you can travel miles of river bar in them with total comfort. 5 ml boot foot waders are easy to get in and out of and are still cosy to wear, but they're primarily designed for bird hunting and staying warm. They're all good.
Canvas is sort of a thing of the past for everday waders. You'll still see some fly fishermen using some some lightweight, trendy, expensive ones to do their thing. I'm not sure if it's because of the comfort or the nostalgia. Maybe they like the way they sound when their thighs rub together.
Boldt