I just start introducing myself: I am a 64 year old electronic engineer, and I spent some of my working years in acoustic and vibrations field.
I have been an audiophile since the 60, and I have been quite a serious classical guitar and piano player at the time.
I had in the eighties a decent Hi-fi chain: Marantz 1090+ KEF 104 AB+ other Marantz stuff, and a good Satin MC117 (and Koss headphones, gone since log time), and I was really enjoying the use of them with a lot of vinyl recordings at the time. Listening to classical music, classical guitar, rock and jazz and blues, and lately new age and celtic music too.
Then, for working reasons, I kept more and more traveling, and my beloved stuff was lying at home, not to mention piano and classical guitar (by the way, not to mention family too...
while I was around the world, quite often buying in the first period vinyl's and later on CD's when it happened to me to be in cheaper areas (for tax reasons mostly). When then I was flying home, I was having a quick hearing session and then on the road again.
When mp3's and iPod came out, I was thrilled by the fact of finally being able to carry with me my music, and of course I jumped in that bandwagon pretty quickly.
Of course, the quality of this listening was quite far from the one I was used to (and my system was on the cheap side, nothing exceptional), but at least there was a listening available.
So, in the years, I've been trying to improve my mobile listening, and I went through several Bose QC15 and QC25 for using on the planes, and a very good in-ear phone Audeo PFE232 (unluckily no more produced). Also I purchase a FIIO amp for the iPod (for the iPhones is not so useful as the volume somehow is better).
But always when I had a chance and I compared to a vinyl on my old stuff at home, there was no comparison and it was always sad to come back to the world of lossy files.
Finally, some months ago, in view of the fact that I could be from then on more at home, I started an extensive search and I tried several headphones, ampli and music files whenever it was possible to find them for testing. And I spent countless hours in Head-Fi blogs, and these have been extremely helpful to me.
As a result, I now have Sennheiser HD650 headphones, and a Marantz HD-DAC1 to drive them.
I am using this equipment to listen to several of my CD that I ripped lossless in the years by connecting my Mac, and also listening to some of my vinyls (both ripped and by connecting the pre of my Marantz to the Marantz DAC).
In these months I also had a chance to listen to some DSD files and of course when I decided to buy the 650s and the HD-DAC1 it was already clear that I would have had a good use with these files.
Maybe I am too fresh with all of this new material to make a deep judgement, but I can confirm by my first listening session what I have read and understood and what I was thinking while buying:
1) the HD650 are at the moment the best I have heard from Sennheiser, and I have checked all of them, but I prefer the bass behaviour of the 650s, and they are more comfortable to wear
2) the HD-DAC1 is a very good device, by listening to it I finally went to some sensations I never had since the first times I was using my Marantz stuff in 1977, it made me almost cry by happiness
3) to start, I purchased some good tracks from Qobuz and I purchased very good classical music tracks from Blue Coast Records, that I had opportunity to listen with other equipments from a friend.
In particular, with a recording of Beethoven Mass in C by San Francisco Symphony released by Blue Coast, I reached the peace of my senses; to be honest, until when I do't know, as I am constantly on the move, and soon I will find little defects in all, but today I am more than happy of the money I spent and I am getting ready to go through the Christmas time with these gifts I made to myself.
Eventually in a few months I will come back with more details on this combination, and also there are quite some friends curious to compare to their equipments, so we will have a good work basis.