I've owned a Grado RA-1, Headroom Max (Latest Version), Sugden Headmaster, Creek OBH-11, Gilmore V2, and Musical Fidelity X-Cans v2- All used to drive Sennheiser 600's with the Cardas Headphone Cable.
On the solid state side, I liked the Sugden best, but....
My advice is: Buy an X-Cans v2 from Kevin at Upscale Audio, and purchase the Private Reserve 6922 tubes at the same time- Total cost with shipping will be under $345.00. Later you can purchase a bigger power supply from Ault for about $19.00 with shipping if you wish. I'll be honest with you...of all my Headphone rigs, this is the combo I've enjoyed the most, and I'm as picky as most of us. I've found that there's just something right about this combo that makes it outperform everything else I've tried...an immediacy, warmth and delicacy that fit oh so well with the Sennheiser 600's.
Now having said this, we each have our preferences, but I think this combo would work quite well for you.
Experiment and enjoy!
On the solid state side, I liked the Sugden best, but....
My advice is: Buy an X-Cans v2 from Kevin at Upscale Audio, and purchase the Private Reserve 6922 tubes at the same time- Total cost with shipping will be under $345.00. Later you can purchase a bigger power supply from Ault for about $19.00 with shipping if you wish. I'll be honest with you...of all my Headphone rigs, this is the combo I've enjoyed the most, and I'm as picky as most of us. I've found that there's just something right about this combo that makes it outperform everything else I've tried...an immediacy, warmth and delicacy that fit oh so well with the Sennheiser 600's.
Now having said this, we each have our preferences, but I think this combo would work quite well for you.
Experiment and enjoy!