Best radio ear defenders ever are these:
Bilsom Radio Ear Defenders 28dB SNR | Screwfix.com
Quality and reception will knock the spots off Peltor etc. However, they've been superseded by these:
Arco Website - Howard Leight Sync AM/FM Radio Hi-Vis from Howard Leight - Product 211000
which are a digital type so may well suffer from the same problems as the Husky as regards turning your head/loosing signal. Can't comment as I'm sick of the radio these days and only use MP3- those ones above have an aux in socket anyway.
Before you decide what to get, make sure you can get the helmet mount. Both as different. You will need to buy a non-radio helmet mount ear defender with the same shell type, and swap them over. For the most recent one, this kis what I used:
Arco Website - L1 Helmet Mounted Ear Defender from Howard Leight - Product 211005
Another way of doing it is to use behind-the-neck ear defenders. My guys like these but I don't.
Arco Website - Howard Leight Bilsom Leightning L1 Ear Muffs SNR29 from Howard Leight - Product 210003
You can just stick your helmet on the top then. So onto helmets- you sweat a lot? Me too, get the lightest and most vented you can. I use this:
Arco Website - JSP EVOLite Vented Helmet from JSP - Product 4J4900
Buy some extra sweatbands:
Arco Website - Centurion Safety Helmet Sweatbands from Centurion - Product 422600
Be aware that you can get stuff like this, and new outers for the ear defenders:
Arco Website - Howard Leight Cool 2 Ear Muff Absorbent Pads from Howard Leight - Product 201200
Hard hat adaptors are needed to fit the helmet mount ear defenders to the helmet of your choice. Usually one of two, decide upon your helmet first. This is the importers page which is good for listing all the accessories for those radio ear defenders: All adaptors have the standard Euro slot for you to use the mesh or plastic visor of your choice.
Howard Leight | Hard Hat / Helmet Earmuff Adapter
I got mine from Arco but you may have to ring them as their website is pretty shite, epspecially when looking for specific extras and adaptors.
Thinking about ear defenders again, you could always get the cheap MP3 only ones:
Howard Leight | Sync Stereo Earmuff
plug your phone in via a cable with mic, then use the phone radio and be able to answer calls. I have those ones on helmet mounts and they're excellent, only about £45 with the mounts.