You'll need a "
region-free" DVD player to watch discs from Region 4. (There are ways to change the region on the DVD drives in computers, but you have to be careful not to switch regions more than
maximum allowed five times.)
I would have bought
Dennou Coil already had it been released on Blu-ray, but I can't bring myself to spend $100 on a DVD release of a show that was originally produced in 720p. I did buy the excellent
soundtrack CD (one of my all-time favorites) when
Coil was released as a method of support. It's quite a bit cheaper now than it was then, too.