I appreciate your response to my ideas.
Well, I have a regular ol' 55 (48L*20H*13D or something like that) which I love. It combines good length, not-excessive height and shallow depth (which I think is great for all but the larger fish when they need to turn, as water quality appears clearer this way). Also, the thinner the tank back-to-front the more distance the fish have to swim at a time. A small fish can swim for almost 4 unfettered feet in my tank, and that makes me feel a little better about keeping them cooped up!
I guess the point I'm really trying to make is one of perspective and surface area of the "viewing" glass pane. The larger and wider the viewing pane, the more you will enjoy the fish, and be able see what's going on in the tank. With a tall/less wide viewing surface, you miss out on this. Plus, as was mentioned before about tall tanks, fish don't tend to use up all the possible space in the tank. The higher the front pane it is, the less of it will be filled with fish at any given moment.
Keep in mind, also, that hoods and lights for standard sizes are much cheaper and easier to buy/replace. A hood for a regular ol' 55 is easy to find, though not *cheap* per se...
Lastly, there's no restriction to what you can do with a really cool piece of driftwood (or several) in a 55. My recommendation would be a long log-like piece (20-30 inches long) with small branches or roots radiating from the central trunk. These should reach a fair way "up" the tank if possible. With this shape of driftwood the tank can be brought together perfectly. Furthermore, you can attach java moss and other mosses to this central log in order to give it a more natural or planted look. See what Alliv has done with her java ferns. This can be done on a larger scale with different types of plants. Also, if you're into rocks, you can spread small pebbles/stones (about 2-5 inches in diameter) around the driftwood in such a way as to simulate entropy(!) and that will help too. If you want a large rock, you can decide to divide your tank a little, and have the large rock define a back corner and have the driftwood a little further over towards the other extreme of the tank. PM me if you want some more ideas. Also, if you didn't check my gallery out before, I have some simple examples of this in my main tank. Mine aren't fully expanded on as I've got somewhat limited time and resources...
Anyway, by now I'm blathering and making little sense.
HTH