Why not term limits for the House and the Senate?
Three terms for the House. Two terms for the Senate.
There is not any evidence that leads to a conclusion that term limits would make anything better. In fact, I think it makes the situation worse.
The problem isn't that we aren't cycling through enough candidates, the problem is that the candidates we have are engaged in a constant campaign and are having to respond to interest groups rather than the interests of the country. Congressmen are having to spend more and more of their time raising money rather than doing their job. Term limits doesn't fix that.