what they said =) what artists, labels, sound your into will evolve over time.. and as it did for me it takes a bit before you know what your into.. for example when i started out i bought so many shit tuness.. but you have to get through the shit before you find all the good stuff =) eventually youll know what labels to look out for, and what artists, and what sub genres your into.
But yeah theres some great mixes on here to listen to.. also thinks like bestseller charts, or genre charts at places like D&BArena, Trackitdown, Beatport, or Juno =)