I've got a Narco Com 120 in my Terrier, despite certain folk slating them mine has a good range and the audio clarity is absolutely fine, I would argue it's as good if not better than my mates Becker.
So should the time come when I have to replace it, does anyone know of a budget make that will fit that size tray and avoid wiring alterations. I'm not to keen on the round type such as the Becker, they're a bit fiddly.