Aussiesteve,
I was at deVries a few weeks back and we discussed a similar project as we'd just taken a barrel off a Remington action, so we put a 505Gibbs alongside and had a squizz. Just buy a CZ at $3800 if Cleavers still has them as I reckon you'll be pretty close to $3k for metal work on an M17 to pretty it up and get it ready.

If you do go M17 ... a P14 bolt is preferable and a Remington action arguably the best.

I spoke with Slee and he can make an M17 semi-inletted stock with wider butt etc easy enough.
Cheers...
Con