The great thing about the obelisk is that in the winter, when leaves fall, you are left with a great sculptural shape in the garden. Speaking of sculptural shapes, the new trellises come in all shapes and sizes. One of Steve's favorites is shaped like a folding screen. It breaks apart into three sections or comes together for a bold garden statement. Many trellises are now made of lightweight metal.
Rusty forms look great in the modern garden.
A large, arched trellis adds an architectural detail to your yard. They cost more, but in return you will get a sturdy form for hardy plants. Check your local nursery for more interesting trellises.