When I first listened through the new Evanescence cd, "Fallen", they reminded me of someone. All of the comparisons I've read have been to Linkin Park because of that one song where there a guest rap vocals. But Evanescence never reminded me of Linkin Park. It had to be someone else. Everyone said Evanescence didn't sound like anyone else.
They were wrong.
Evanescence has some goth-sounding undertones to their music. Strengthen those goth sounds, have better percussion, and add another main vocalist who's male and you have Wedding Party.
Wedding Party would make a good soundtrack to the Lord of the Rings trillogy. They have that symphonic sound with thundering, marching percussion perfect for the war scenes. Then they have "simpler" songs where it's just a piano or guitar and a female voice singing.
Wedding Party would not appeal, however, to the mainstream culture the way Evanescence does. The more extreme music would be too challenging for a market that wants everything sugary and poppy. Personally, I like Wedding Party better than Evanescence.
Most people will not have to make a choice, though. Wedding Party's only cd came out in 1998 and is unavailable now. But if you run across some mp3s somewhere, please check them out.