I am currently using some Vsonic GR07's and I am loving them, however as these IEMs introduced me to the audiophile world I am wondering about getting something that gives me even better sound quality. Seeing all the positive reviews of the GR07, I'm wondering how high up in terms of price would I have to go to get something that is, quite simply, better than the GR07 in terms of SQ? (Talking about IEMs only, of course). I've been looking at the EX-MDR-7550, and they do look quite interesting as the EX1000's younger brother, but I have no means of trying them out. I'd say my budget is under $250 usd.
I'm also wondering if it would be easier for me to get an amplifier and/or a DAC as the means of improving the SQ? I've tried out the E17 briefly today (~15 mins) and although I don't feel a massive difference, it does feel like the mids do come out more, without touching any of the bass or balance settings. However it really doesn't feel like a massive improvement for ~150USD.. should I gradually expect myself to realize the difference the amp makes? What I mean by that is, if I use the amp for a longer period of time I would begin to appreciate the difference it makes, and once I go back to without an amp I would distinctly feel the differences. I also have some Grado SR80's, and I'm wondering would an amp+dac be a bigger difference to these headphones?