In reply to Trevers:
Check the avalanche forecast. If that gives you the all clear, decide whether you want to climb gullies or ridges.
If gullies, there are at least two lovely ones in Coire nan Lochan, and another two belters in Coire nam Beith. All II or I grades.
If ridges, the main ridge of the whole mountain (including Stob Coire Sgreamhach) is not to be sniffed at. There's also An Lairig on the eastern side. Or if you like queuing, check out Dorsal Arete
Bidean is a playground for the soloer, if you're careful and canny.
Post edited at 20:24