Best way to aquascape with rock

[bond007069]

What is the best, most eye appealing was to structure a 29 gallon. I am not happy with my current design, i carefully placed the live rock to make a wall. But this look boring an i don't have sufficient area to place new corals. I was thinking about using PVC pipes and maybe egg crate and zip cords to hold a frame. What do you guys think. Tank is a 29 gallon so i dont have lots of room.