Just ordered woods tw6-6 cams from fuelmoto,will report back on results after i get them installed.
Woods cams are made by andrews and according to info found on web have won all major dyno shootouts.
with stock heads I'd go TW6-6 all the way. I run the TW7 with my stage 3 heads and my scoot pulls like a train. there is some valve train noise though....worth it to me.