I too have raised beds about the size of yours except I plant 3 of them for tomatoes. I used to use tomatoe cages but every year the plants would outgrow the cages. The only cages I found that were any good were the square ones from Gardener's Supply Company but even those you would have to stack them 2 high. If you are going with cages those are very good cages though. The cages would often tip over late in the season, which does not happen with a trellis.

I have a lot better luck using a trellis made from steel fence posts 6" tall (above ground) strung with wire garden fence.

I sink the posts between rows and tie the plants on other side to the trellis with twine.

I asked the same sort of question a week ago and had a great thread. Here is the link, and there are some pictures in there too
Jeff

Here is a link that might be useful: Thead

Kubota, I'd be making the cages from the same fencing material (anchored to a stake), so they won't blow over.

Jeff, that's some discussion you got going! People seem to be saying it's a matter (mater?) of personal preference. I think I might do some of each and see what I like for next year.

it's a matter of personal preference Yep. ;)

I think I might do some of each and see what I like for next year. That's the way to go. :^)