Tuna - yeah, he worked out so well in Dallas. 
Gibbs - Ditto in Washington 
  
Here are some other great retread signings: 
  
Dennis Green in AZ - disaster 
Marty S in Wash and SD - never won a playoff game 
  
There have been success stories as well.  The most famous being Bounce-a-check.  But he was a horrible failure in Cleveland.  If we were to hire a coach like that the fans would be the crap out of ownership.     
  
Basically my point is hiring a coach (with experience or not) is a crap shoot.   
  
I agree with you, however, that we need to spend more money on offensive scouting.   In this area we have failed miserably. 
  
Peace