I thought I suggest a few albums that might appeal to those that like this
Pain Of Salvation Remedy Lane Its a bit more emotionally driven and conceptual in nature I prefer the vocals http://open.spotify.com/album/4tl2Rynem8A7LapdDQ5Y9c
Andromeda ii+l http://open.spotify.com/album/5UuuNHVBgswbD7TGrQzOx7
Wasteful Soul Rain 21 Very similar to POS but has a Greek vibe going through it, another conceptual album
Spirial Architect A Sceptic Universe This is very complex and deals with a dark exenstential stance towards humanity
Zero Hour The Towers of Avarice: Heavy complex with Ronnie James style vocals and some of the nicest guys I met http://open.spotify.com/album/0RmdWmWYGeh7OkajI7glT8
Queensryche Operation Mindcrime A classic http://open.spotify.com/album/4eEQ3aNA8mptFIfbFdX79p