@Phil2360 Where in Aus are you???? Most HO dealers in Aus should be offered skis to purchase at a reduced rate to use as Demos. AND Sports Image (Aussie distributor) also have a range of Demo skis that dealers can get hold of to run Demo Days. Radar do a similar program as well, Senate C is a good option too.
As for the 2 skis, I've been on S2 66.5" for a little over 12 months and have not had a single issue with it, VERY user freindly ski and am similar weight to you. Typically we do not get the high water temps that others post on here get which could be the reason the 67's felt big IMHO. Have aslo seen plenty of people on CoX SL and seems to be a sweet ride as well, I'm also a big believer of you will adapt and get used to what you ride, i.e. pretty sure there is not a bad ski on the market!