Beethoven Symphonies - Which one would you play?

[dnephi]

As many of you know, the Beethoven-Liszt Symphonies stand as arguably the greatest work of transcription ever completed.

Horowitz said that they were "the greatest piano pieces ever written." 

Now, if you were to play one, and only one- which one would it be?

Things to consider:

1. Length - How long will it take to perform/learn?
2. Difficulty - How much work & for how long would you need to work?
3. Suitability- How effectively is the music conveyed through the keyboard?

I look forward to hearing your responses.