I am going to buy a set of radios for use while dune riding and i have no experience with these so any input on a good system would be appreciated.

 

I don't know about the whole intergrated communication for helmets but you probably good get a pair of walkietalkies and a set of headphones w/ a mic and your probably good to go. I might be trying that soon.

 

I've got them, and they work pretty decent. I think mine are the communicator 900 or something like that.
I bought them for use with snowmobiles... pretty short range, usually line of sight or so, depending on the trees and topography.

I have yet to try them on the dunes, but I will this summer. It's really handy to keep track of your group when riding, and also warn about blow holes, witches eyes, etc.

They are alot of $$ though, I found mine on sale... Otherwise I probably wouldn't have got them.