I'm looking at upgrading my iPod Touch 4G to a better DAP. I'm not worried about size/expandability or features/UI. I'm only interested in sound quality (unamped) and battery life. I have a budget of £200, which one would you recommend from the list above (or a different DAP altogether)? Please bear in mind I'm in the UK (import duty/tax is a b****h!)
I listen to a wide range of music (classical to rap) and it will be paired with a pair of Sennheiser Momentum, Amperior and Sony MDR-1R.