Looks great! I'm digging the tall tank/aquascape too!
Long term word of advice, you might regret having the rocks all the way against the back glass. It ends up being a trap for detritus, food, algae, and poop which can result in issues with nutrients when the tank matures. Not to mention it will make it difficult to impossible to clean the back wall.
If you could to try and bring it forward a couple inches that would be my recommendation. Better now than when you have a bunch of corals and critters to make it a big pain to move your rocks.