This really is a FAQ!
I can't find the search facility for the forum at the moment, but if you go to http://www.themodernantiquarian.com/forum/?s_id=425 you'll see lots of threads asking for such recommendations. There's bound to be something there that takes your fancy...
I had a week up there, and the longest walk from the car I took was to Sunkenkirk - just over a mile each way, and worth every step!
Have a good time, whatever you see.