Binding Q again...

If I'm into getting one of the new CWB bindings, which size should I get? SM or MD? (assuming I can't demo...) I'm a size 7.5~8. I used the 05 LF Transits in medium and they fit perfectly but the 04 transits in medium were a little big. I think LF made them smaller in 05. The medium was size 7-9. I also wore the HL bindings in mini-med and they fit well too. Now I want to try a CWB since I only hear good things about them, and I really want to try out the new hinge system, but not really sure which one would fit better. I did hear that the 05 models were a little smaller than the 04's. Is that going to be so for the 06's? I really like my bindings to fit tight, especially at the ankle. Sorry about questions that you all probably answered hundreds of times...