I just voted for POM. Bought it the day it came out and it still blows me away. In my opinion it was the hardest sounding album. I felt that the sound started to be a little less heavy on Powerslave, with the exception of "Two Minutes to Midnight" and "Aces High" I did not like Somewhere in Time and wished that they had kept the real heavy sound of the earlier recordings. They were at the top of their game then, definetly.Steve Harris has said that alot of people in America say Powerslave is the best album, but he says that POM was "intense and epic" and I totally agree.