Mike: This is the exact setup I was thinking of, with 16" S-Winders to minimize the unsprung weight (from pictures, it looks as though they ought to be lighter than the other choices in 16-in).
Two questions:
(i) Which wheels do you have do you have on yours, and did you pick Summer or all-season runflats?
(ii) How does your setup work on crappy roads, compared to the standard suspension with 16 inchers?