Rhiannon, et al,
Being a mountaineer, I can confirm that the highest mountain in Argyll is Bidean Nam Bian at 3,773 feet (1150 metres) high. For the Gaelic enthusiasts, I think it is pronounced "Beetyan Nam Beeoan". It stands to the west, when driving down Glencoe from the Rannoch Moor.

Travel that route in darkness, on a February evening, with snow showers blasting across the moor, and the only things directing the car being the snow poles. Near the top of the pass, look to your left, and, if lucky, the towering peak of Buchaille Etive Mor will show, glittering in crisp snow, between clouds, under a full moon. A haunting scene.

Regards,
TE.