Hey Jamie, I make NTH watches, and I appreciate your interest in them.
I know Jason Lim from Halios, and Steve Laughlin from Raven. They're both awesome guys, who make awesome watches, truly top quality. I think you'd be pleased with any of these.
Having said that, the Raven is 45mm, a bit larger than the Halios or the NTH. If you're looking for something larger, there's your winner. If you want something smaller, that would seem to rule the Raven out.
If you get the Halios, you'd be supporting a fellow Canuck. Jason usually makes watches in pretty small batches, so if you don't get one as soon as they go on sale, you'll be looking for the rare one that comes up for sale on the used market.
We've already produced one batch of the Nacken Modern Blue, and this next batch will be the last of them, for whatever that's worth.
The Nacken and Seaforth are similarly sized, and I'd think they'd wear about the same, but the Seaforth is a little more "dressy diver", whereas the Nacken is a little more toolish.