After a while reading the posts on these forums, I wanted to thank everybody for all the useful information. In the past hour, I purchased the following:
Hifiman Velour Earpads
Hifiman Silver coated copper cable (8m) ---- I know, I know. Cables don't do jack but I figured why not lol
Hifiman travel case
Schiit stack, with PYST RCA cables
Custom Cable from Custom Cans
Plan on using the HE-400 and amp/DAC for home use and the HD25 and E12 for portable use, with my Cowon J3
Next step for me is to do some research about converting audio files into a better quality format (e.g. WAV, FLAC, etc.) and what settings to use for my J3.
Let's see how it goes.