Maybe the best way to get the ball rolling would be for a few of us to decide on a couple of possible dates and a route etc that suits us and see who else wants to join in?
Speaking purely selfishly, it would suit me if it were in the SW/Borders area, which might also attract a few folks from further south - like Dal - who will have a fair old drive just to get here before starting any 'grand tour'. Galloway/Ayrshire/Borders has some superb scenery and great roads - the Highlands are wonderful but they're not all that Scotland has to offer - and it's easy to underestimate how big Scotland is, especially if you rely on the distorted weather forecast maps...
Or how about the Central Belt (Loch Lomond?) which would make it more accessible for those further north like Cava & Scooby?
If Steve takes a trip to look at the SRT for sale in NI, he'll have to pass through this area - that could make three of us!
Anyway, I'm open to suggestions...