In my e39 (non-NAV and non-DSP) I had 3 different set ups. First I had the Ice Link Plus, then the original Dice and then the Dension Gateway 300.

I kept changing to see if there were better controls on each one, in the end they were all very similar. The audio quality was great throughout the board. My favorite one though was the Gateway 300. Easy install, great controls, and it has a CD Changer Retention kit that works with the e39 and the e53.

When I traded the e39 in for the e53 I forgot to take the Gateway 300 out, so I lost it. Tried to have the dealer give it back to me so they wouldn't budge. In looking for a new kit found the Intravee and really like its controls on the NAV screen so I went down that round. Really like it but there are some quirks that drive me nuts.

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Jeff
Current:
'07 Jeep Wrangler
'06 BMW X5 3.0i

Former:
'12 WRX; '08 WRX; '06 BMW X5 4.8is Dinan S1; '02 BMW 530i Dinan S2