Here is the scape you illustrated in that arial view you gave me, realized with paint. I remained very faithful to what you planned, but bear in mind without actually being there, I can only guess at the ratios. I'm pretty good at this, though.
As you can see, the red is not put to the right, yet the scape lines lead away, giving you two focal points. While it's not a bad scape by any stretch of the imagination, I don't think it's optimum.
Below, I took all the plants you wanted and arranged them in a different way. I create lines in the scape that will lead to the focal point, which I still maintain is that the junction of the two pieces of wood.
I like the use of stargrass and pogostemon. This will keep that "star" shape in a line. Pogostemon is also one of those cool plants that you can kind of stick between the wood and it'll create an interesting look. Great contrast plant to anubias and moss. I didn't draw the moss on the scape, too hard and everybody knows what moss looks like. If you noticed, I'm also a very "curvy" scaper.
Nothing is in a straight line. I've taken your crypt wendtii green idea and ran with it, mixing it with brown and extending it throught the back of the tank, where it'll meet with the Vallis nana. This will give you a lot of extra plant mass and utilizes the back of the tank with beautiful plants that are very easy to maintain.
You'll also have more swimming space for your tetras. Don't worry about the corys. You don't have a sand substrate, so they'll actually appreciate roaming about the plants and it'll provide a softer surface than the gravel, so you can cover the substrate if you want. If you had a fine sand, I'd leave bare patches for you as I personally enjoy the contrast. Habrosus, while it behaves like a typical corydora, will also roam all tank levels and loves vegetation. At least that has been my experience. In many ways, they are kind of similar to the dwarf anchor cats I kept.
Of course, Colin, these are only suggestions. You ultimately do what pleases you. Aquascaping is a very subjective art and I have a very distinct style that not everybody likes.
Oh, Ian, you are just selling the hairgrass aren't you! For me, hg and tenellus they are interchangeable. Depends on what he wants. Same green color, same function in the scape. Hg is more delicate and I do like the look better, but it is also harder to get established than tenellus. It's a matter of what he wants to do with regard to maintenance. Surprised you haven't come out and endorsed the riccia!!!
That being said, I've not said a word about moss walls...
