Originally Posted by GreenLight
The PGP is just a marginal head from top to bottom.. The 5000 has a far superior seal and now all of them have a slip clutch, those two features alone should all but eliminate the PGP from consideration on new installs.. That said, I do agree that the I-20 is far superior to both in my experience. I come across 10-15 year old I-20's that still run like a top.
and the 5000 blacktop is cheaper than a pgp... no brainer.