Cheers mate! :3
They're called The Amity Affliction. If you wanna listen to their songs, I recommend No Sleep 'Till Brisbane, I Hate Hartley, Anchors, HMAS Lookback and Olde English 800. Those are my favourite songs by them. They might be a bit heavier than what you listen to, but then again, I don't know everything you listen to, so then again, they might not be. They're mainly more screamo than clean vocals, but Fightstar has a bit of screamo, so... Eh. I dunno. Check 'em out, anyway. They're really good. (Well, I think so, anyway! :D)
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I'm going to youtube then right now! I like the name already. It's got a certain ring to it.
It's a hit and miss when it comes to screamo for me. Some of it I adore, others not so much.