Late to the thread, but I think TRON is fantastic. Super tough. Great shots. The super tough GEM shot and fairly tough CLU mode make it quite strategic.
The sound is definitely top 10 if not number 1 - no better music in pinball between the newer speakers and Daft Punk Soundtrack.
I was hanging with Andrei Massenkoff last night and put up 60M+. He played a few more games and got Portal. Was ONE SHOT from finishing it - he ended with 130M. By the end he had a crowd of onlookers. Too cool.
EDIT: Check it out: