In reply to Pbob:
> I'm attracted to the idea of free-heel skiing although I've never tried.
You shouldn't.... it's stupid...
> I like the idea of lighter more robust kit. I also have an old ankle injury which plays up a bit sometimes and I think that the extra movement would keep it from stiffening up.
It ain't and the freedom will prolly wreck your knee... or ankle.
Reasonably solid skis, with tech bindings and suitable at boots (eg. TLT6) is the way to go. Depending on how flimsy skis you get, they can be a true set for anything else than bottomless Utah or Niseko powpow... Whilst my opinion on "touring" skis are well know here, I'm not that set on skiing in Scotland... So won't comment anything other, than you might get wider and longer skis than what someone suggest (or not).
As for skiing on-piste... well, you need to know how to ski down, but even though the skiing on or off piste really isn't different, n00bs seem to make it so... So, my advice is to ski on piste in order to get feel on skiing dynamics. But after you survive down (with a tine amount of style) some harder slopes, also set your target to off piste skiing. And even think of doing a trip to the alps... skiing soggy moguls on a steep piste in afternoon sunshine, with ice everywhere else and about few hundred others bouncing around from said moguls... well, nothing even remotely as hard is available whilst touring...