I've been a bit hooked on Apocalyptica, mostly because it's very different. A lot of their old stuff is good. The version of Metallica's One is incredible considering it's four guys on cellos.
Be that as it may, the way cellos make some of their songs sound is amazing. It's worth a listen in my humble opinion.
In Flames' new album is really good, since you say you're a fan of cleaner vocals. Apocalyptica is good, except for "I Don't Care". Song is complete garbage in every sense compared to all of their other songs.