OKW is beautiful and its one of our favorite places to stay at WDW. I love how peaceful, and quiet OKW is.... especially after a hectic day in the parks.
I recommend you request a top floor unit, if no one in your party has trouble w/ climbing stairs. The view is better, units are only 2 or 3 levels high.
As far as which unit, what are your prefrences -- water view, golf green/fairway, near a bus stop, near a pool, smoking of non-smoking unit?
Here is a link to the resort map
http://wdwig.com/okwmap.jpg
you can enlarge it
We had a second floor unit (top floor) Building 37, at the turtle crawl area. I thought it was an ideal location. It was a short walk to bus stop, pool, hot tub, and snack bar. The view was of the 5th green.
I basically called OKW and put in my requests.
If you need additional info, just ask. You will love OKW!