Update now i have my car back
#1, the dealer can't find it or hear it. As soon as i got it home it started again. I'll leave it for a few days and then see how it goes. 
#2, no action dealer said they've checked the suspension and is fine. Must be true what "Robbo51" has quoted.
#3, Cured. They said they have replaced the window rubbers and guides.
#4, Typical this never happened for them even when i told them to leave the radio on for at least half an hour. Seems like it only does it for me
I'll have to drive straight to the dealers the next time it starts. They said they have checked all the speakers for any bad or loose connections so time will tell.
Their attitude was and i quote " you've got plenty of time left on your warranty so if it gets worse just bring it back"
Not what i wanted to hear
original list of issues.
1, Loud whining noise from the Fan Belt Pulleys
2, Knocking rear suspension when cold and mainly when reversing
3, Front windows rattle when open a couple of inches, irritating clicking noise
4, Popping noise from the speakers when the radio, cd or ipod is playing. Sounds like interference, static, or loose connections.