Skream is sick. Dub step/glitch ftw
If you're not the kind of guy who needs to blare loud music out his car windows to feel like a man, you may dig the Silversun Pickups. It's really loud guitars with super poppy vocals. I wouldnt be surprised if they end up making it huge on the radio over the next year or two, they remind me of a modern day Siamese Dream-era Smashing Pumpkins.
http://www.youtube.com/watch?v=AG8fugqFn9Q
Or if you're feeling some straight up Jersey rocknroll a la Bruce Springsteen, check the Gaslight Anthem. They're nothing new but they've been gaining steam steadily over the last year or two. I'm really upset that I missed them opening for Murder By Death last month.
http://www.youtube.com/watch?v=bOBb13yDnzo
Or if you're feeling something really out there and experimental check out Battles. I dont really know how to describe their sound, extremely metal drums (their drummer was in the original lineup of Helmet back in the 90s) and tight musicianship mixed with really wierd sound production and effects. This song gets in your head and you'll probably find yourself humming the beat for the rest of the day. The vid is a shortened version of the song, the album version is 7 minutes long.
http://www.youtube.com/watch?v=IpGp-22t0lU
And the Star Fucking Hipsters just came out with a new album, I havent had a chance to check it out yet but here's the single off their last record. This is a side project from the Leftover Crack clan (Choking Victim, Crack Rock Steady 7, others). These guys are one of the punkest bands on the scene right now, LOC was the most offensive, these guys just make good fun punk rock.
http://www.youtube.com/watch?v=iAqRHaQxStU