PDC and rear camera. Worth it?

[kakalika]

I am thinking of ordering a 35 Diesel without the technology package which consists of PDC, voice command, real time traffic, and rear camera with top view. I would opt for the nav system just by itself. What do you guys think? Are these extra electronics absolutely necessary? I have a 2004 E60 with PDC, and I have never had the need for it. I always switch it off just to get rid of the annoying beeps when I am backing up. I am planning to keep this vehicle long term, and am worried about the reliability of extra electronic gizmos. I also find pressing buttons faster than voice recognition.