Apologies for the dumb question, but I had the opportunity to give these a go in Tokyo's Akiba department store, and I was blown away by the HD700. I even got the chance to try out the HD800, T1, and W5000 and I just found myself enjoying the HD700 so, so much more than the previous 3 even though it was unamped, running straight through my HTC One. So, the question is, exactly how necessary is amping for these cans? I was already very impressed with them unamped; is buying an amp for them really that important, considering I'm on a pretty right budget? I know amping will obviously improve the performance, but is the improvement significant enough to justify spending $200+?
Willing to spend up to $100ish if that's the case, so recommendations are appreciated