I recently bought a pair of DT100 and I have been driving them with a Sansui CA 3000 with excellent results. The right amplification does make a difference with this pair for sure. If this condition is satisfied then they are great: very controlled, detailed and still fun. I prefer them over headphones with a wider low frequency extension which most of the time alter the entire shape of the piece.
Great !
Remember with the old obscure Beyer designs...a good seal is key.
A DT100 with a good seal is quite a headphone....the peculiarities are worth the cash.