Thanks Gene, So using approx. 7ft. for the fronts and 30ft. for each rear speaker is ok. That's what I wanted to hear thanks.
The cabels are all of the same brand and gauge. (Ultralink 12 gauge). Which seems to be good cables, so far I have not had any issues with them, except that I have them at approx. 15ft. ea. Which has created a mess behind my cabinet. Thanks for the reply.