|Wuthering Heights. Yesterday it accompanied me while I was washing the window ;p. Also, Sonata Arctica (if you don't mind the vocalist high-pitched voice, and his poor english pronounciation), and Iced Earth. Oh, and if you enjoy Blind Guardian, you sholud try Demons and Wizards (though I'm not sure if it's power metal, it sounds a bit different).|
|the genre's so gay to begin with, i don't know how you're going to find...|
|DragonForce - Valley of The Damned|
Gamma Ray - Somewhere Out In Space
Rainbow - Rising
But really, Keeper of The Seven Keys pt.1 is by far the best power metal album of all time so you actually only need that one. Oh and Dio isn't power metal...
|Labyrinth - Return to Heaven Denied|
|And Then There Was Silence is easily my favourite power metal track ever, epic as snot|
|Vicious Rumors - first 5 records and the last 2.|
Oliver Magnum - the self titled
Jag Panzer - everything
+ what MisterSteel said.
|And Then There Was Silence is easily my favourite power metal track ever, epic as snot |
Gamma Ray - Somewhere Out In Space 
Iced Earth 
Sonata Arctica 
And it wont hurt to check some Edguy's earlier stuff, along with Avantasia.
|they're more progish, aren't they?|
|STRATOVARIUS - EPISODE / VISIONS|
ANGRA - HOLY LAND / ANGELS CRY
VIRGIN STEELE - INVICTUS
EDGUY THEATRE OF SALVATION
|Check out Lost Horizon, yo.|
And yeah if Symphony X counts but I view them as more progressive than power.
|hibria - defying the rules|