We couldn't easily visit the resorts in person so we reviewed online photos of the resorts to help us decide if DVC was for us and which resort to purchase. The previous poster (tjkraz) has some great photos on his site,
http://www.dvcnews.com/. Roll your mouse pointer over "DVC Resorts" and click on a resort. Over on the left, click on "Maps and photos". Each group of photos for each room type (Studio, 1BR, etc) includes a floor plan for that room type to help you get your orientation.
Another favorite of mine are the photo tours on
http://www.tagrel.com/. Roll your mouse pointer over "Disney Vacation Club" and select a photo tour from the drop-down menu. They do not have a photo tour for every resort but the ones they do have are very helpful.
Allears also has a comprehensive set of photos on their accommodations page:
http://allears.net/acc/faq_hot.htm. The resorts are listed along the left side of the page. The DVC resorts are listed about halfway down the page.
ETA: You mention you are interested in OKW. It was recently refurbished but many (most?) of the online photo tours show the original room decor. Some people have provided updated photos in their trip reports. You might want to do some googling to find updated photos of OKW before making a decision. Many of us are not happy with the refurb since the new colors and furnishings don't fit the theme as well as the original decor.