omni paint question

Hey guys.
I am in the process of having my 68 Barracuda painted, part of the deal is that I purchase the base and clear. The engine bay is already painted with omni PPG "GG1"single stage. Now I have to get PPG base / clear for the rest of the car. The other day I stopped by my local paint supplier and they recommend Omni base and matrix euro clear. They said if I wanted PPG "GG1" pretty much my only option was Omni. I have only hear bad reviews about Omni,
Any suggestions guys?
Thanks