Though not exactly the same situation as yours, this thread may help: http://986forum.com/forums/general-discussions/52243-40k-budget-s-not-s.html
You probably should search the Forum on both your questions (S vs non S; IMSB).
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2000 Boxster S, 6 speed, Sport Package, Litronics, LED tail lights, LNE IMS-B, OBC, Skybreaker wind deflector, Arctic Silver/Graphite Grey
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