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I don't use poly very much because while rubber breaks down over time that time is usually 20 years or 10 years of everyday driving. Poly will wear like any other bushing due to the fact that you have to grease it to keep it quite. My experiences are that ploy depending on who makes it vary in fit, some loose and some tight. Rubber is a smoother ride and poly is a firmer ride. Some poly won't let your suspension flex thru the complete travel unless you grease them, rubber may be too flexible for some applications. If you use after market arms you may be limited to poly.
I bought some DJM arms that were so loose that I couldn’t use them and went with stock arms and rubber.
I'd stay with rubber unless you are drag racing or road racing and have the time to properly fit the poly bushings. With rubber put them in and don't worry about it. You will have sold it long before the rubber wears out.
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