Hi Stickman,
There are far less choices available with isolated ground outlets. I could be wrong but I do not think for example that the Porter Ports are isolated ground. I have tried the PS audio outlets ( not the more expensive gold plated outlets). The cheaper ps audio outlets are nickel plated and at least to me don't sound very good. I do use isolated ground outlets and have been using Hubble 8300 outlets sourced from Voodoo cable. I have been using these for 5 years and feel no need to change them.
Arnie