I use a Gecko a fair bit, used to hate them but the MK10 is very good.
Mine is fitted with comms and works really well.
The comms can either be into a hand held or direct into a fixed set via a intercom or not depending on your needs.
I have tried another helmet recently by Gath.
They do 2 styles and are cheaper than Gecko.
One has a visor that slides away in side the helmet, like a fire service one.
The other has a visor that looks a bit like goggles.
Both very comfy.
The second does make me look like I should be shot out of a cannon though.
Yeah I know some may say not a bad thing!
D S Developments have just launched a comms unit to fit the Gath helmet, I have yet to try it out.
Hope that helps a bit