If I had the guts I would buy a high mileage, non-S, drop a 3.4 in it and then make the appropriate mods to the suspension and the brakes. The S seems to be an off-the-shelf happy medium of what I wish I could have and what I perceive the base as being (key word being "perceive").
As seen driving with Randall and NickCats, I don't think the difference is as big as I thought it would be. NickCats autocrosses quite a bit with me and he is only a few seconds behind me which I think is primarily the difference between my R compounds and his tires. Randall, and the other base models, held their own at last years Tail of the Dragon trip.
When I originally bought my car I was looking at a base model but fell in love with the white face gauges, six speed (worthless in my opinion) and the bright red calipers.
To sum it up if I can't do what I mention in my first sentence I would probably opt for the S simply due to my perception of having more power, awesome brakes, a few styling cues, and the fact that the S is on the rear trunk.
