Waynes World,
I hope you enjoy the iHiFi 770 as much as I do. I initially bought the 770 to be a secondary player to be used at work, while exercising, etc. However, I now find that I am using it at home, often more than I am using my iHiFi 960. The main reason is that I have found an iem that, for me, pairs very well with the 770. I think you will be very happy with the power and sound quality of the 770; additionally, you will also enjoy the absolute silence between tracks and when the player is turned on or off (no pops or clicks). Be sure to test out all your earphones with both HOs to find the sound you like. Also be sure that your player has the settings you prefer. On the same screen that is used for Repeat Mode and Play Mode selections, you will see a setting for MSEQ. Your choices here are 3D, Bass and LEQ. I am using the LEQ setting, but some may prefer one of the others. Then you will need to set EQ Sel; here I've chosen Normal, but you may prefer one of the others. I imagine that your player will come with the latest firmware (put out on 7/28/14). I think the newest version is 2.02. The latest firmware did not change the sound quality as best I could tell, but it did improve the speed/responsiveness of the touch buttons and it also fixed the problem with the player's recognition of the microsd card. Prior to updating the firmware, I had to reload the microsd card every time I started the player, this is no longer necessary. Oh, by the way, the light display time can be as short as 5 seconds; I just chose 10 secs so I could have some extra time while I was getting used to the UI.
I still like the iHiFi960 very much; but to be honest, for rock music I can often get a more powerful, fun sounding quality for songs using the 770. The only real problem that I have encountered with any of the Xuelin players occurs with occ FLAC files that are more compressed than about compression factor 4-6. The player will occ stall and give a shrieking noise with these files; I was able to change the compression rate on these very few files using Audacity and I've had no further problems with them. I have not experienced any problems at all with WAVE or MP3 files . All in all, I have been very happy with all the Xuelin players I have. Best of luck, and again, I really hope your enjoy the 770.