There are great photos of these rooms at Barb and Tony's site...
I think it is Castawayclub.com
5020 and 5520 are definately the least obstructed, and look great! They are the NON connected rooms... And, unless you really want the connecting door, I hear that you can sometimes hear sound from room connecting yours.
If the room you want is not available, your TA may be able to put you on waitlist for it.... sometimes they do come thru!!