I haven't played a single metroid prime game but if the music is this good, I might be willing too.
The music in Metroid, much like Castlevania, has always be spectacular and all the games (or most) have something awesome to offer. Personally I love the 3D ones (Metroid Prime 1, 2 and 3) because they offer such great environments and detailed gameplay (not to say the older ones didn't).
You should definitely check them out!
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