Everything from Suburban Base: http://ftp.amigascne.org/pub/amiga/G...Suburban_Base/
Especially the 13 disk
music disk "Dance Diverse Vol. 2".
It's really oldskool stuff though. You might want to explain to your son how the Amiga's sound system is essentially a low memory 4 channel sampler.
For a bit more modern dnb I guess Haujobb demos with soundracks by Muffler. This one for example: http://pouet.net/prod.php?which=54617