don't really listen to stratovarius but it sounds like plenty of other power metal bands out there. i'd say sonata arctica is a very close match, more specifically their 2003 winterheart's guild album since that's the only one i've listened to. there's the general big ones like nightwish (don't know how they are now) and epica, and other few like angra, symphony x, ancient bards, kamelot, theocracy, ayreon, maybe a bit of teramaze's her halo album, etc. if you don't mind harsh vocals, some cool bands to check out are stuff like hope for the dying, devin townsend's weird but good stuff like deconstruction, and ne obliviscaris from what i can name off the top of my head. xanthochroid might be harder to get into if you're not a fan of black metal harsh vocals similar to ihsahn but their stuff is beautifully put together and not all of the songs use the harsh vocals because the dude knows how to sing too.
