I think it's been done to death now...the general consensus seems to be stay 500' or more away from anything that is not the ground.
IMHO 500' is low enough for any GA. Bear in mind that some of the main line electrical pylons are 250' high and can be difficult to spot if you're not specifically aware they are in the area...even flying just a little low around those things would cause severe puckering of the seat.