Yeah, I would second that. I have 'only' the SR007s but the sound I am getting is incredible.
NO FATIGUE, GREAT DETAIL, BEAUTIFUL TUBE MIDRANGE, TREBLE INTO THE HEAVENS.
My system is tubed Audio Note DAC 3.1 which is None Oversampling, so that might be the reason I am
so content. It is the most organic and smooth sounding digital I have heard.
And I use a Mac Mini with M2Tech full stack as the SPDIF convertor and external clock, which has a big impact and
easily beats 10K+ CDPs. Basically it gets right to the source, no extra sampling or flab, pure music.
I would recommend you look at your source components. Try a None Oversampling DAC preferably with a good
tubed based output. Look at a good tube based headphone amp like the Blue Hawaii or LL. And ensure all your cables
are good quality. If using a DAC with a PC, it needs Asyncronious USB, and use good software like Audirvana+.
Actually, if you sold off some of your headphones, but kept the 009s, and got an Audio Note DAC and the BH,
you would have a killer system!