Bros n Sis,

I've just purchased a brand new 2007 Mazda 6. The car itself is very impressive.The only thing that worries me is that it is too silent. There is no security alarm installed in this unit, I guess because it's an all Japan assembled, probably they do not need an alarm in Japan. I am planning to install an alarm but would appreciate any feedback from anybody who has installed it on their Mazda 6. I am also planning to install a reverse sensor.-Any suggestions which brand will suit best?