Just purchased a Denon AH-D2000, primarily for use with my Macbook Pro and am currently using it directly with the headphone output on the notebook. While I am pleased with the Denon's performance in general, I am also understanding how it needs to be amped to get the best out of it (i.e. driving it too hard now makes the bass sound loose and uncontrolled while trebles get shrill).
Hence...I am looking for a good entry level amp/dac combo. I am currently considering the Fiio E7 and iBasso D2 (Boa), though they do not necessarily have to be portable. If the difference between the Fiio E7 and iBasso D2 isn't enormous, I would prefer to save the money and get the E7, but what are people's opinion in general on this matter?