Hi,
Just thought I'd give you my 2 cents. I just recently auditioned for Grad. School and played Op.26, the one with the variations. I think this is a great piece because you get such an incredible variety in playing throughout the movements. Everyone wanted to hear the first movement (variations) and the 3rd movement (funeral march). I'm not sure how popular it is, but I had never heard it played, and all through my undergrad, I was the only who did play it. It wasn't hard to learn, it was easy to memorize and the technique was quite reasonable, you shouldn't have any problems with it, with your tedonitis. Both of my auditions were successful, so they obviously liked it.
What school are you applying to? Let us know which sonata you decide to go with, I'm sure we're all curious as to which one you will pick! It's a tough decision, there's so many great sonatas to pick from.
Good luck!
Mandy