coming from a death metal background, I would suggest some drum and bass. I just recently came back from a sick ass dnb show with dieselboy and bad company. here are some of my faves
dieselboy
bad company or )eib(
dara
ak1200
technical itch
ram raiders
total science
kemal and rob data, konflict
teebee
raskal and klone
ink
loxy
dylan
dillinja
marcus intalex
zinc
twisted anger
roni size
source direct
ltj bukem
here are a couple of my favorite songs
ram raiders - titan
total science - wots my code
konflict - messiah
dj stratus - get hype
technical itch - dimensions
j majik - space invaders
)eib( - start the fire
)eib( - torpedo
)eib( - rush hour
)eib( - planet dust
that is mostly the bigger names, but once you start listening to this kind of music, you get to know the smaller, more undaground names/choons. this should start you off.