I had EZRiders put on my 2007 Classic Plus last year and I love them. They ride so smooth. I got them from my Gammill dealer but they are not the Gammill replacement wheels.
A friend put them on for me and said they were easy to install(but he's an engineer so that kind of stuff is easy for him).
I don't know of the EZGliders. I would go for the EZRiders.