I bet that'll look great in your garden! I wish I'd thought to ask my husband to make an arch for ours when he built it. My husband is good with woodworking, so he made a nice sturdy wooden frame.
The nice thing about building one yourself is that you can make it as high and as sturdy as you want. Some of the store-bought ones aren't very sturdy, and they are generally not high enough for some tomato varieties.