I have both and right NOW the SF is a little better...wait till the mid-production-stream second iteration of the SL TL-3 though, which could make it become very interesting indeed...but then SF may already come out with the KL5...but by then SL may come out with their (oops, work calls, plus I can't say any more right now anyway!)...but I think the heydays of the modders as we know them is becoming quite limited, unless, of course, we keep pushing the very battered and creased and fuzzy and dog-eared front edge of the envelope...!