critical metrics is a nice little site that pulls the most talked about songs from various mp3 sites and blogs and lists them along with samples and related videos.
current top 5:
1 “D.A.N.C.E.” - JUSTICE
2 The Heinrich Maneuver - INTERPOL
3 Boyz - M.I.A.
4 Elephant Gun - BEIRUT
5 Fluorescent Adolescent - ARCTIC MONKEYS
personally i recommend interpol