Good looking shots. I have the L also but wonder if it was worth the extra. Although as far as reg to L it wasn't as big a jump as a lot of their lenses. Just wish it were white like other L's.It is L, but I've used regular 100mm a few years ago and it was very good as well.
My next lens will probably be another Sigma APO. I have the 70 × 200mm 2.8 APO I use for sports and it rocks. I think they have a 150mm macro.