Turbo Lover.. kickstart my heart...
I don't trust the ingame music.. the only problems I've had with GT5 are with music enabled.
It might be time I made some custom tracks though... There once was a pc game called Stunts, where you could make some sweet tracks...
I usually turn off in-game music and listen to my iPod with speakers while playing GT5. Going through Eau Rouge-Raidillon singing "Shiiiine on you craaaaazy diaaamond" is just awesome Obviously I have some of my favourite GT3 - GT4 songs on it too