I use this setup with a TV, PC, and my Squeezebox Touch, all connected with Toslink optical using a big switch to select between them all. Too lazy to take a new photo, so I am just using the same photo I recently shot with my phone for my avatar.
Source (TV, PC, Squeezebox) => NuForce Icon HDP as DAC with LPS-1 power supply => Schiit Asgard amp => Denon D5000
I'm estimating about 2W of potential input power to the 25Ω Denon's from the Schiit depending on the current level of the 2.6 Vrms output of the Icon HDP. With a max rating of 1.8 watts input for these headphones, I should have plenty of headroom available to permanently destroy my hearing if I get careless. (if you are familiar with the equipment, you may be able to see in the photo that I don't really go blasting my music at deafening levels)