The tour kicks off in Napier on October 1, ending in Dunedin on October 10, and promises to deliver the best blend of country, alt-country, spaghetti noir, rockabilly, folk and honky tonk you'll hear anywhere.
Genres aside, it'll simply be a night of cracking music. "People come up to me and say 'Oh man I didn't know I liked country music'," says Davidson, laughing at the perceptions some still have of so-called country music.
"And I think, 'Well, it probably wasn't country I was playing, but who cares, you saw some music you liked and that's awesome'."
Davidson, who has won countless APRA NZ Country Music awards, is one of the most prolific artists around.
He and Williams are two of the brains behind the Sad But True album series and he's got several solo works to his name. His next, Lucky Guy, will be out in early September.
"It's an album I recorded in the Lab in Auckland with Olly Harmer. It came out of working a lot with [local artists] Ben Woolley and Joe McCallum. We were like this core team for so many bands, and I was like 'Man, we're really cooking together. Let's just do an album with us three'," he says.
So with a repertoire as long, and as varied as Davidson's, you can be assured his involvement in the 2015 Church Tour will be more than just a "new album" set. In the same way, you know for certain this is a tour not to be missed.
The 2015 Church Tour runs from October 1-10. For dates visit churchtour.co.nz. Tickets from ticketmaster.co.nz