I don't think renting is the way to go for me. I'm going to want to shoot regularly with the new camera for 3-4 months just to get used to it (and the ways it differs from my old familiar D90). The current price for new D7000s is a steal, considering what you get.
And yes, we continue to enjoy the 18-200. It's my wife's all-purpose lens, and I have taken it on a couple of business trips to give me a single lens do-everything option.