I don't think two beds of tomatoes is too many ... I was only planning on doing 1 4x8 bed, and ended up changing things around during planting time so I could get 2 4x8 beds. And now I want MORE! I LOVE love LOVE homegrown tomatoes, and they're such a nice thing to give away if you get too many for yourself, and aren't canning. In addition, the scent from a tomato leaf is one of my favorite smells in the garden, so I would plant more of them just so I could touch them!
I have 7 tomato plants (was 8, one didn't make it through a storm) in 1 of my 4x8 beds, and 9 in the other 4x8 bed. I think the bed with 9 are planted too close though, because I also have 14-16 inches or so at one end dedicated to onions.
Now, I wish I'd planted them farther apart, like in the first bed. But the plants were so LITTLE when I planted them, and I think that's why I made the mistake of planting them too close. I got greedy with the last bit of prepared planting space I had!!
This is the bed w/ 9 plants, and at the end of the bed just off the bottom of the photo are the onions. These are heirloom plants, and I've never grown them before, so I don't really know how big they're going to get. I may have to keep them in check w/ trimming when they get larger.
In the bed w/ 7 tomatoes, and 1 zucchini (planted where the #8 tomato plant was snapped off in a storm), I like the spacing of the plants SO FAR ... but they're still young!!