[rdass623]

i own both a 00 boxy base and an 05 boxy s. the base has a plastic rear window, and the s has a glass window. when all is said and done they are the same to me. the glass will stay clear longer, but the plastic if kept clean stays clear enough for me to operate the car safely. if i were to replace either top they would maintain their original style top. as far as the boxster chop, i have never done that, and probably won't ever because i have never seen the need to do so. on previous cars both have been also used. usually i have found by the time a plastic window goes bad, it is already time to replace the top in it's entirety. unfortunately, my cars stay outside, so they are exposed to the sun's u/v rays constantly which will accelerate a top's deterioration. my personal advice would be worry more about the car it's self rather than what top is on it.