Looking at getting a portable amp/dac for my Denon AH-D2000s. I'm considering the Fiio E7 just for the recommendations and the price, but is there anything out there that has a 1/4 headphone out? I did a little searching and found nothing, but I've also never looked at portable amps before so I'm not really sure what to look for... Source is Macbook Pro and iPhone (not too important, but if it's small enough I plan on using them together) Headphone is Denon AH-D2000 and Shure SE 315s (again, not as important) I can only spend $200, and even better if I can find something on Amazon, as I have a gift card (another reason I was looking at the E7, and an E3 connector.) Any ideas/suggestions?