Requesting electronic modification advice

[nsimmons10]

Hi. I am the original owner of a 2001 X5 4.4 (Feb 01 build) and only just found this website. I would like to add a few electronic upgrades. It seems that options depend on the vehicle builld date and exisiting amenities. I need guidance on what is possible for my car and the most efficient way to accomplish the upgrade.

I would like to add NAV, IPOD input and integrated or bluetooth phone.

I need to buy a new cell phone anyway so phone model is not a limiting factor. I ordered the car with premium sound (I think it is called DSP) with an in-dash radio and cassette player and Nakamichi glovebox CD changer. I would like to keep the CD changer connected. I could get rid of the cassette.

Your input is appreciated.