I have a 987 with no PASM, it is on 19's originall equipped with 18's and the ride difference isn't really that much.....I would go on record saying the ride on 19's to me is not a brutal and jittery......please don't get 17's....I don't even think they are an option for an S.....
in terms of the stereo.....its the best one I have had in a convertible yet especially when playing CD's......the radio reception is the only thing that sucks but I think that is more to do with my unit, it will be looked into in 2000 miles....
can't help you with the navi other than to say I wish I had the factory option in my 987....to do it over again....what's anohter couple thousand of debt
