Not been to that many, but:

Went to Culsh (Aberdeenshire) recently - it's pretty damn good - will post some photies soon http://www.themodernantiquarian.com/site/2929 easy to find & get into

Mya fave's probly Grain on Orkney mainland tho http://www.themodernantiquarian.com/site/599

Rennibister on Orkney's good too http://www.themodernantiquarian.com/site/5110

Are you excluding fogous? ;^)

love