Thanks, 2GZ. This is good info, I am thankful for the forums.
It would be nice to have someone else do the work... someone who stands behind it. But my buddy says the dealer here in Virginia Beach would charge $600 to replace the sensors, which they would do first, and over $1k to change the catalytic converter, which they would do if replacing the sensors didn't work.
That's a bit high. If I were going to spend $600 to possibly $1600 on the emissions, it woudln't be for a repair back to factory condition.