The new T3s should be available in early spring, meaning the next couple of months or so. Other than that, there is limited printed information on the rifle. As such, we are all just sitting here anxious about it. However, if these rifles are anything like the current line-up, then they are still #1 in my book for the money.
As for scope mounts, you have a few options. The most expensive option in the Opti-lock rings and bases. I had this set-up on my Tikka Laminated Stainless. However, I gave the scope and scope mounts to my relative and I bought a new scope and new rings from Warne - they are the Warne Maxima Silver rings, and they attach directly to the receiver with no bases. Once I get them I'll give you a report.
There are other options with regard to scope mounts, but since I haven't used them, I'll let others post about their experiences.
I think that the new Tikkas just might come with the rings and/or bases. Only time will tell.
Zachary