My favorite band is I Prevail - for me they have the perfect mixture of hard screaming and wonderful clean vocals.
You also can feel that their lyrics come from the bottom of their hearts - not just a cheap PR-thing like most of Metalcore-bands a few years ago.
The best examples would be "Low", "Hurricane", "Lifelines" or, my favorite, "Worst Part of Me". Since I'm not allowed to put in URLs yet, it'll be the best if you search for them on YouTube or any other streaming site.
Oh and live... They'll make the house explode, it's just awesome.