Nuforce Icon HDP. It's a Headphone Amp,DAC and Pre-amp. Need Sugestion?

I just bought a Nuforrce Icon HDP , Headphone Amp, DAC and Pre-amp. Need sugestion?

Is it a good for a System Set -Up for IPod / ITouch as Headphone amp and Stereo Listening?

1.IPod / ITouch connected to a Wadia 171i direct connection to a HDP Icon as a Headphone Amp  for a better DAC even without a computer?

2. Ipod/ITouch Wadia 171i direct connection to a HDP as a Preamp and connected to a Marantz PM 8003 Amplier as a power amp for Stereo Listening?

I need a sugestion.

Thank You,

Audio8