trolling motor prop

[working man]

Gonna get a backup prop for my motorguide 24v 71 lb. thrust trolling motor. Think I'm gonna go with a 3 blade. Was wondering if you guys had any suggestions as far as if I should go with a standard plastic or a glass filled prop. I fish shallow a lot and quite frequently encounter rocks and other underwater obstacles with the trolling motor. I hear the glass filled is more rigid and therefore hooks up so to speak quicker when you engage it. But I wonder if that also means it will break easier when it contacts something solid. Any thoughts would be appreciated.

[Cray]

It's supposed to be tougher than standard prop but if is going to be spare I'd just get cheapest. Have used both and really couldn't tell the difference.

[working man]

Thanks. The glass prop is only a few bucks more so I think I will probably go with it.