FFVII has traditionally worked well as an introduction to the series, in fact for many people it was an introduction to both the series and RPGs in general. As a result I think it would be worth testing out. I know you didn't want people to name any PS1 titles but I figure if you say those are two dated then the SNES ones are well and truly dated and that only leaves you with a choice of FFX and FFXII.
Personally, whilst I enjoy the FF series I would simply skip it all together and go play Chrono Trigger.







