I would be using the current version of Ipod classic paired with a Westone UMPro30, my worry now is that the centrance is a amazing amp/dac however its too damn huge to be a portable set up and the battery only lasts for 6h, whereas the KOJO can last 16h with a single AAA battery, however the KOJO weighs a ton and its only a amp, and the sound quality still wouldn't be there even if i were to rig the KOJO and my Ipod, i would need to spend additional on a DAC as well. Both are amazing amps! heard both of them before and personally love the mids and highs of KOJO however the Clarity of the centrance is just AMAZING! kinda hard decision now.. wanna try if anyone could help me? Feel free to comment as im a amateur as stated in my profile name! cheerssss!!!