So, I've almost finished my search for a new pair of headphones. It's come down to
Koss Pro DJ100 vs Superlux HD661
Both can be found for $50 on Amazon, both are closed (and don't leak sound), and both are relatively flat (not overly bass-heavy).
Which one's the better phone? For the record, neither of these will be used with an amp, and either of them will be used mainly with a MacBook Pro.
EDIT: 668B's are also an option, but I think they'd leak too much sound (semi-open)?
Aren't the 661's 150 Ohms? Will they work unamped with your computer?
I know that the the Koss is borderline with many portable unamped devices--don't know about yours though.