Absolutely! Either action is just right for a rebarrel and sporterization. I believe that all you would have to do with the VZ is rebarrel it in 7x57 - case head is the same and the magazine well is very generous.
I think that if you want to go with the 260 you may wish to consider the Yugo - the action and bolt are slightly shorter than the VZ, which would both allow you to load the bullet out further than usual if you so choose and it may also make it easier to load the shorter rounds from the shorter action. If you choose the 6.5 or the 7mm - same deal
Howsoever - if your VZ is in good shape and accurate, you may wish to consider dressing it up and spporterizing that. If not, there are a bunch of gunsmiths you can send it out to for rebarrel, reblue, triggers, d&t, etc.
Either is your choice. This sounds like fun. Keep us tuned in. Mikey.