The Griots nozzle is more of a soap dispenser than a foam gun.
The Gilmour is the way to go, they're all a little pricey. I'll admit, I wasn't a believer in it being any better at first either, but it is. I've had mine going on about 3 years now I think.
I have tried foam guns that attach to the garden hose and I was never satisfied.
So I switched to a foam cannon (I already had the pressure washer) and would never go back. For the same amount of soap I get many times the foam.
Here is what I am using.
And I have two pressure washers. An electric Karcher that is 1600psi and a gas powered one that is 4000psi
I use the electric washer with the foam cannon. Works great.
Thanks for the advice fellas. Looks like I will bite the bullet & just get a good one. The foam-master from Autogeek costs more but I probably works better too...