I'm looking for a repacement cover for my 20x40 rectangular in ground pool. The current cover is at least 10 years old and shredded last winter. Looking on Amazon, I see similar covers for around $600, ot Loop Loc for more than double that. Is Loop Loc that much better? Also, my old cover was a heavy vinyl with stap reinforcement which seemed to be waterproof. The ones I see on line now say they keep leaves out but allow rain water to seep through. Is that the way to go?