Th real question is, what is driving you to change? The FZ30 is a very well-respected camera. Give us an idea of what about the FZ30 is not meeting needs, and then we'd have a better basis for judging which way you might want to go.
With regard to the S100FS, do look at the DPReview review, and pay specific attention to the conclusions. Although it die well in some areas, it did quite poorly in others, namely with respect to chromatic aberration. |