I've cruised through several posts, but the best path and product is not clear to me...

I want to do wireless, and I see that installing a hub or "station" in the car is the way to go. Which is the easiest? Those who have done this - can you reply?

More details:
I want to sync with the unit in my car from my desk, which is typically about 500 feet away.

Ideally, I'd also llike to be able to get file-level access through bluetooth (transfer a song to/from my iPaq 3870). I know this is more tricky than just the wireless platform, but would also involve knowing how to create and read the files straight from the empeg volume.

Thoughts?