Welcome, "new poster" Angus, and don't shy away from telling us what you think. Most of us on this site are MCMs (Mucci Certified Morons(tm)) anyway.
I agree with you on Cruden Bay vs. Dornoch. Both places are great experiences, but they are not of the same class. Don't worry about Sean's 7. He's mathematically challenged (given that he plays like a 2 and pretends he's a 10) and thus probably doesn't understand the logarimthmic nature of the Doak Scale......
As to Bonar Bridge, give it a pass. I've played there several times and while there are a few great views over Loch Migdale there are also lots of midgies and the golf is medicore at best. If you want 9 holes within 30 minutes of Dornoch, go to Portmahomack, which I've walked but not played, but it looks like proper quirky links golf. If you do and like it, let us know and I'll play it when I'm next up in Dornoch in a month or so. Also, Portmahomack is a coll wee village with a great on-going archaological dig and history museum right near the course as well as a fine fish restaurant, the Oystercatcher (if it's still there).
Enjoy.