Audio-Omega
Headphoneus Supremus
You would need tight bass for rock.
I'm starting to like this Sophia Electric because it has better resolution than ShuGuang Treasure and it doesn't sound grainy. My only dislike is its bass is not up there with ShuGuang.
I'm still waiting for it. Hopefully it's not too far away.
May be my Sophia needs more breaking in. Its bass has improved a lot since I bought it which was surprising.
Have you listened to orchestral music or movie scores through your Bad Boy ?
I've been using my Peak/Volcano as a preamp lately, and I gotta say I still like to use my Mullard ECC32. Another favorite is the Fivre 6SN7GT. Maybe I'll pop in my Badboyz and give it a shot sometime soon.