I have a web design client - West Highland Sailing - who runs a fleet of cruisers out of Laggan Locks on the Caley Canal. In addition to a large fleet of motor cruisers they also have six yachts.
The yachts are rather unique in one respect. As far as I am aware this is the only place in Scotland that you can charter a cruising yacht with no previous experience whatsoever. You are not allowed to take the yachts beyond Banavie or Dochgarroch, but there is good sailing to be had on Loch Ness, Loch Lochy and Loch Oich. The yachts are three Moody 28s, two YCA 29s and a Sigma 33. Prices for a week range from £495 for a YCA 29 low season to just under £1100 for the Sigma at the very height of the season.
No idea if anyone who reads BlueMoment would find this appealing, but as it is the holiday booking season and the new yachting site is now live I thought I would give it a punt on here. The boats are (obviously) far from new, but well kept. Here's a pic ofthe Sigma 'Lively' on Loch Ness way back in 2001, being sailed by Mark of this parish:

http://www.westhighlandyachting.co.uk