I am planning to sell or trade in my blk/blk 2007 X5 for a 2012 model. I have a few questions and very interested to hear your feedbacks from all of you.

1- How is the new Hi-Fi sound system compare to the premium Hi-Fi sound?
2- B/t these two options, premium Hi-Fi Sound and multi-countour seat options. Which option is a must have?
3- How much over invoice should I target? From $500 - $1500.
4- Have any new 2012 X5 owners from Southern Cal get their cars close to invoice? If so, can I get the contract person or dealer info?

Thank you much in advance.