[quote author=elliot link=topic=138354.msg2994675#msg2994675 date=1237076521]
It looks like the Grom has some slight advantages to the Audiolink, such as ability to scan and play random tracks. It's hard to tell from their manual which of its features are supported on the 3. They say that "certain car models" can do certain things, like display tracks, handle 99 CDs, etc. but they don't go into detail about which cars support which features.
One annoyance of the Audiolink is that tracks are played in the order that they were copied to the flash drive, and not in alphabetical or track order. The 6-CD limitation is also annoying, but I think that's a limitation of the 3, not the Audiolink. I have almost 99 tracks on one CD and it's a pain to skip through to the 99th track.
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Grom has two modules, one for the ipod, and one for a simple audio input. The OP is talking about hooking up a sansa mp3 player so it seems unlikely he'd be looking at the ipod version. If he went with the audiolink all he'd be using is the 3.5mm input which would be a waste of money when compared to the cheaper price of both the AuxMod basic, and the grom simple input.