If you are experiencing rough idle with a warm engine it's most likely the rack damper bolt. You can adjust it. I would suggest trying to adjust it before replacing the engine mounts. There are two versions of the rack damper bolt. A silver one which is the old style, and the gold one which is the new style and is supposedly better.

To adjust the rack damper bolt: With a warm running engine. Loosen the lock nut. Then back the adjusting bolt out. Then adjust it back in, but only just enough to smooth out the idle. If you go in too far it will cause hard starts. Adjust it in and out a couple of time to make sure it is right where it should be. You can also pull the whole rack damper bolt out and try pushing the tip in. It's spring loaded and if it's really stiff then the bolt is still good, but if you can easily push it in then you need a new one.

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