After two weeks of burn in, I think I have some rough idea about this device.
The DAC section of this device is truly amazing. I think it can match up with anything on the market in the price margin. The extra headphone amp + the SACD player makes it a better choice than some sub $2000 stand alone DACs .
For the DAC section, I used my Benchmark DAC1 as reference. They are about the same in detail level. They are both very clean and highly transparent DACs with minor differences in sound signature. Due to the nature of the saber chip, the BDP-105 sounds a bit warmer than my DAC1. However, I do not think there is anything missing in the high frequency. It is just smoother and more relaxed treble. The mid-range is excellent with plenty of detail. The sound stage is about the same as my DAC1 which are much better than the HDVD800's on board DAC. The lows carry more weight compare to my DAC1. It is good for most of my pop and rock music, but sometimes I felt it has been over emphasized. I guess I am just too use to German designs, in which "bass light with high treble energy" is "normal" to me. Since all test has done through balance setup, I cannot comment on the RCA output.
With all the file format I have tried on it, everything got played well as long as they are on the USB drive. The network streaming is still a work-in-progress. As for now, only WAV and MP3 can be detected in my network server. Since I do have a spear 128G usb key + two extra external HDD, there is no issues for me.
The amp section is not as impressive as the DAC section. I does make all of my headphone loud enough to hurt my ears ( including my HE-6 which normally require a speaker amp to power) . However, this does not mean it can properly drive all my cans. The truth is, it does not release the full potential of the DAC. If you compare it to a sub $300 amp, you will think it is pretty good. However, if you compare that to my HDVD800, it is not as transparent and detailed. I found both bass and treble are lacking some extensions. Especially for HE-6, the power is not enough to control the bass which makes it mess up with the lower mid a little bit. It makes the tight HE-6 sounds booming in bass. For HD800, the ,amp does not provide enough detail for the sound stage to shine. It makes my HD800 sounded dry and artificial in some of the classic recordings. The treble in this amp is well defined, but does not extend very far, which affect the performance on sound stage.
Overall, I find this is a very good device to replace my source and DAC. If you are considering to get rid of your PC in your signal chain, this is the idea device . However, if you are trying to find a very high performance integrated system that has very good headphone amplifier on board, you probably need to go elsewhere. For any flagship headphones, this amp is still a little less than adequate.