I just got my first pair of headphones, the Ultrasone PRO 750, and I'm wondering how much improvement I will get from upgrading my DAC / amp setup.   I have the FIIO X3 PMP, which I connect to my laptop for use as a DAC / amp. Does anyone have experience comparing the X3 to other...

I've been getting serious about audio for the last year or so, and Head-Fi has been hugely helpful. Based on recommendations here, I purchased the Etymotic hf5 IEMs a while ago, and I love them: their clarity and balance are unlike anything I had heard before.   I've started to think that...