Thanks for the input guys....
I forgot to mention that the gas filter was changed also to no avail. Oil is changed very often with Valvoline - no additives. Exhaust system for contamination? Hmmm I'll have to ask about that one. I'll take a closer look at idle....but when the car is running fine...it does not drop below 700. When its running like crap I believe it does...I'll have to take a second look.