Great thread JustLikeMe! I actually voted Tron LE, but it's a very, very close call for me to decide between either of the two games.
I'm actually currently weighing up getting one of these two games myself, either going for a NIB AC/DC Premium, or somehow finding someone who's prepared to sell a Tron LE. Lucky You! I'd love to know how you managed to get hold of a Tron LE here in the UK! I assume it came in from Europe, as no-one wants to sell here. I was talking to another collector the other day who has just picked up a Tron LE from abroad as well.
Quoted from stevebighead:ACDC for parties and drinking beer with friends, Tron for playing while alone.
As stevebighead said, these two games are very much like MM and LOTR in this respect. In an ideal world both games would be in my collection.