Would like a touchscreen mp3 player preferably with wifi. Upgrading from a 3rd gen ipod touch, It doesnt matter if it needs an amp I have a fiio E6. I am on a budget so under 150

Hey guys, just bought a pair of Sennheiser CX-880is, I will be listening to them on an Ipod touch, and I have heard that the headphones are quiet and need a lot of power to operate at a good volume. I probably want an amp for them, to make them sound better, but don't really want to spend more...