Looking for a Network Music Player

I am looking for a reasonably priced Network Music Player, or plans for one that I can build.

These are my requirements

1. App for tablet/cellphone, Android & iOS (required)
2. Ethernet (required)
3. WiFi (preferred, but with an ethernet input an Access Point in client mode could be used)
4. Analog outputs for pre-amp (required)
5. Digital output, coax to connect to my pre-amp or future DAC (required)
6. Built-in storage (preferred, but not required)
7. Built-in DAC (not required)

An example of such a Network Music Player is the Sony HAP-51, but there are a few reasons that I can’t/won’t purchase this unit.

1. Price ($1000 is more than I can spend for such a unit)

2. An amplifier is built-in (Although it has analog outputs so it can be used with a pre-amp, the fact that it comes with 40 watt/channel amplifier means that too much of the cost of the unit went into something I don’t want and wouldn’t use. If that money were spent on a better DAC, it would be more desirable to me.)

3. No digital output (The unit comes with a DAC, and even if it is halfway decent, at some point I would probably want to use another DAC. It can’t be done with this unit because there are not digital outputs.)

The things I like about the Sony HAP-51 are:

1. Connectivity (Ethernet & WiFi)

2. Storage (Although not a requirement for me, it does have 500 GB hard drive, and should be enough storage for me at this point in time.)

3. App, both Android and iOS (It does have a great app, which is one of my main requirements for such a unit.)

I don’t know if a reasonably priced unit such as this exists, or if there are plans for a computer to be used as Network Music Player. I think I could build such a unit using a computer right now, but the main problem would be that I don’t know how I could access the music from an android or iOS tablet.

I would appreciate any help you can give me along these lines.

Thanks

Edincleve