Ideal tow vehicle?

My husband and I are planning on getting a 2720SD or SL in the next year or so, but first we need a tow vehicle. The original plan was to replace my Toyota Corolla wagon with a Toyota Highlander (hybrid would be great, but the little bit of gas savings doesn't seem to justify the price difference between the regular and hybrid model) but now we're reconsidering that.

Mainly because my wagon gets really good gas mileage (not as good as our Prius, but still) and replacing it with something that is less fuel efficient, when it's just for occasional towing, doesn't compute. The rest of the time it would be my runaround vehicle, where the mileage would count more.

The other possibility we've thought of is to keep the wagon and get a used truck suitable for towing the trailer and to use for home/garden center trips. A friend recommended a Toyota Tacoma for their reliability, but I'm not sure if it's quite big enough for towing a 2720SD or SL. Plus their resale stays pretty high.

So if all of you experienced TMers had your choice of used trucks or SUVs (in the $8,000 or less range, what would you get?