I was searching for a thread for the 171i and found nothing so here it is.
The Wadia 171i is an iPod dock that is designed to override the 3 cent DAC in your iPod and send a purely digital signal to your external DAC.
Wadia is one of only two companies that I know of that makes this type of product.
The 171i comes with a remote and an adapter to allow you to plug your iPhone and iPad into it.
I'd like to rant and rave about what a great product it is but honestly i have nothing to compare it to and frankly all it is to me is a dock. Albeit a high end dock for audiophiles but a dock nonetheless.
Please let me hear anyones opinions on the 171i