Thanks for all the responses on this. We went and test-drove a Touring on Saturday and, I confess, I was completely gobsmacked by it. What a wonderful machine! Incredible driving experience, smooth, swift and planted. Interior is spectacular. The whole package just felt, well, special.
BUT the more I think about it, the more I'm coming around to the idea of a used GT. As Impatient7536 and des16 have said, it seems to make a lot of sense. So I'll take my time, see how prices shake out over the coming months, and look for the right GT.
Cheers!