Goatboy- Wish I knew, I never did such a comparison. However, I will say 2 things-
1. Senns not known for being dynamic
2. There are HP amps out there known for being substantially better than MG Head.
If you are in NE US, you are welcome to come over and try 2 hp amps (Granite Audio and Audiovalve RKV M2) I own with your Senns. Or try to find a "meet" on Head-fi.org near your home. There will likely be 5-10 different hp amps there to try out with your music and cans.
1. Senns not known for being dynamic
2. There are HP amps out there known for being substantially better than MG Head.
If you are in NE US, you are welcome to come over and try 2 hp amps (Granite Audio and Audiovalve RKV M2) I own with your Senns. Or try to find a "meet" on Head-fi.org near your home. There will likely be 5-10 different hp amps there to try out with your music and cans.