First of all, congratulations on your 14 wives. Impressive
However, I have mixed feelings about the GTD-ness of your solution. I'm not criticizing it. If it works for you, fine.
However, the solution: next / soon / etc. reminds me of the one from Secret Weapon. Allen would rather see a calendar and due dates here, but fine.
However, the context zone is very ephemeral here. There's no energy or time at all. And I consider this a serious shortcoming in light of the GTD methodology.
Ultimately, the goal of GTD is to focus on one thing at a time among many options. If you have 10 projects on your list, you can still manage that, but with a larger number of tasks, the ability to filter out what can and can't be done at a given moment is invaluable.
I also use the Evernote approach. I followed Allen's official Evernote instructions and decided to use contexts as notebooks (tags are an alternative). I tag time, energy, priorities, and a few other things, such as personal/professional.
This way, I can actually tell Allen what to do on Wednesday at 3:22 PM.