Well, if you're talking about CPU, then clearly you've already developed your own board layout and specification, so on that basis, most of my initial questions are already answered, including who will provision hardware drivers and adaptation?

I'm not trying to rain on your parade, but a little bit of pragamtic realism is required when talking about building a device from scratch, based on someone else's UX.

Blowing off my comments by suggesting "Most of those things can be done buy many people" fails to identify just who, and how much work is involved and thus takes us back to square one.

As for how long the wait is for Vivaldi, I don't know, but I can say it'll be here a lot sooner that any device being talked about on this thread, and it'll have (has) proper hardware drivers.

Of course if you don't want to wait, you could try the pengpod.