Avantasia, one of my favorite metal bands, released two albums back in April. I've been listening to them a lot lately. They're very cool. Basically if you like power metal with some symphonic pomp and progressive tendencies thrown in, this is for you. As with the other Avantasia albums, there are a lot of guest musicians including:

Jens Johansson (Yngwie Malmsteen, Stratovarius)
Jon Oliva (Jon Oliva's Pain, Savatage)
Michael Kiske (Helloween)
Bruce Kulick (KISS)
Russell Allen (Symphony X)
Henjo Richter (Gamma Ray)
Klaus Meine (Scorpions)
Ripper Owens (Judas Priest)

The primary personnel is:

Tobias Sammet (Edguy) - lead vocals, bass guitar
Sascha Paeth (Kamelot, Rhapsody, Luca Turilli) - guitars
Eric Singer (KISS) - drums
Miro (Kamelot, Rhapsody) - keyboards, orchestration