I have the AMPS HD and am loving them more as each day goes by, I had the regular AMPS before and I liked the bass a lot but everything else just sounded average, for 60$ they weren't that bad though, I just am used to my x10i's and my s4i's from Klipsch so I had higher expectations for the mids and highs but the lows were pretty detailed. I went back to best buy to upgrade them for the HD version and there is quiet a difference, they sound amazing all around now, they come with a case that is the best carrying case I have ever gotten with any headphones by far. They sound epic with any genre of music, I am a bass head but at times turn on treble booster on my ipod when I want to listen at lower volumes because they do pack a punch. What's great though is they are only bass heavy when the music calls for it, if you are listening to something that naturally doesn't have any bass these iem's don't produce any fake sounding lows which is awesome!
(I did get to hear the tracks on display and liked them a lot, especially the looks of them)
SOL republic is by far better then the any of the Beats by Dr Dre. and the CEO of SOL republic is the son of the CEO of Monster. lol