We have a wooden fence, 6 feet high. We just had it installed last summer--chain link was NOT an option for us.
First of all, Riley is a climber and a jumper, and he would have been over it in a minute.
And also, there is a public walking path behind the fence. Yes, my dogs can still hear people when they walk by, but they can't see any of the kids who may wish to taunt them, and the kids and people can't see 4 dogs clamoring to get at them.