So thanks to a successful vegas penny machine adventure I have enough winnings to upgrade our 9x18 intex to. 24' round hard sided pool. Unsure what pool to get. Definitely want. Salt water generator and a cartridge filter but struggling with the pool. Some say MUST be resin, some say as long as top/side rails are resin we're good. Just not sure if we REALLY need a top of the line pool versus a higher mid grade. They say wide top rails are better but you're still not supposed to walk/sit on them. If that's true then why wider ones? Smaller ones are probably easier to deal with while cleaning, etc. any thoughts??