Hi Nicole!
This is a tough question. All of the
Disney Resorts are actually very convenient because of the runDisney buses that run from each resort to all of the race weekend events. There are resorts in three categories: Value, Moderate, and Deluxe. Most people will choose their resort based on budget and theme preference.
If you are asking my FAVORITE resort, I would have to say either Disney's Beach Club or Disney's Boardwalk Inn Resort. These are my favorite, and most convenient to me, because of their close proximity to Epcot. Epcot is my favorite park, and I love being able to walk into the back entrance easily from my room.
If you have admittance to Epcot, you can also walk back through the park to those resorts after the race.
I hope this helps! There is so much to love about each resort that it is always hard to choose. Please let me know if you have any other questions.