where were you when PE have it on sale for $85? You won't be disappointed going with the 12DVC but don't take my word for it since I have only experience with the 12DVC.
I also have a Craftsman with the Align-A-Rip fence eventhough it's a pretty decent fence I've decided to upgrade to the to the Accusquare fence from Mulecab.com. I was doing alot of research and decided to get this fence base on opinions and price. And last thing I would never use an expensive...
What kind of box is it in? I don't have a Shiva but I have blown a 12" DVC with 450W in a PR box because. If you have an infrasonic filter then you shouldn't worry.
I just ordered 2 of these to go with 2 Adire's PR. It's gonna be driver and PR's on all side and here's the number I came up with and I didn't wanna go to big either. 4.4cf tune to 23Hz with an F3 at 24Hz. So it's probably pretty similar to the ported designs.
Are there any other drivers better that the Shiva/Tempest that I should consider or are they actually that good?
Have you take a look at some of the sub from Stryke? http://stryke.com/SAL-PB15.html sub along with a pair of Stryke passive radiator in a 4cf enclosure would look really nice but...
I think quite a few people from Madisound board have built the Proac clones. So you would get a few response from that board. I myself have the the enclosure for the Proac clones but funds were not available so I had to put off the project till summer. If I remember correctly Madisound has those...