I also have Warnes on many rifles, and yes, they are heavy duty. On my Kimber, I decided to use the Talley mounts because they are light. In .300WSM, the Talley aluminums have help up perfectly, so I'm sure that they would hold up just fine on your .25-06.
As for the factory Tikka mounts, I have them on one Tikka, but I forgot which one. Plus, I don't think that I have shot it yet, so I can't give you any feedback on it.
Zachary