I would've gone to that if Oxford weren't at home. Been to quite a few pre-season friendlies up the Lane and you always get a good crowd. Went to the PSV and Sporting Lisbon games back in 2003, the 5-1 and Bentley's debut against Roma in 2008 and the Olympiacos 3-0 the following year.
Shalke are in shite form - watched a couple of their friendlies against West Ham which they lost on penalties and then got soundly beat by Newcastle on their own patch. Should be an easy win for Spurs!