You will hear a resounding affirmation from most folks on this board. The BMW BT system is the best available, in any car at any price. It beats what Audi and Acura are offering in their new cars right now. (I have not played with the Lexus system yet.) The kits that Bimmernav is selling are also the best you can get. They are totally complete, and the support is excellent. You can probably do the install in under an hour. Don't worry about spending the money-- as soon as you get the system in, you will be glad you did it.

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SOLD
2000 E38 750iL Highline Edition, Upgraded with the lastest 2006 X5 Electronics
MKIV Navigation, 16:9 Display, Bluetooth, TV/Video with Backup Camera, Sirius, and Aux Input