This is one of the smallest boxes I've seen that handles both streaming and conversion, and the price is tiny to match: $249. The BurrBrown chip inside handles up to 32/384 via USB and there are also analog RCA outputs on back. Though not listed in the catalog, there is a filter switch on the display unit.
Pro-Ject also has another new streamer that didn't make it to the show called the Stream BOX S. It will include UPnP and DLNA ethernet and WiFi connectivity to your network and support app control of your streams. No pricing yet, but should show up near the middle of the year.