Shadow Gallery is a fairly unique band in the sense that what is special about each of their albums is the same. They're a fairly religious band. They didn't create a concept album and a sequel as a lot of people may think. They didn't even create a concept, at all. Rather, they reflect, somewhat introspectively, about a concept expressed over 2000 years. That concept permeates all their musical output. The concept is simple. Without getting too deep into vague terms like eschatology or dabbling into Christian biblical concepts about the end times and whatnot, their albums are all lyrically about keeping hope when all hope seems lost. In that sense, they all work about the same. The differences between albums are primarily stylistic. All the Mike Baker albums exude a We're Never Touring vibe that is impossible to separate from the history of the band. Digital Ghosts is all about getting the Word out there on the stage. So start there. For the rest, dabble. The self-titled is prog rock that suggests a potential for eventual prog metal greatness. Carved in Stone is wimpy AOR-crossover music. Tyranny is standard prog metal, and is considered the "classic" work. I remember Glenn running to the Magna Carta table when they made their announcement at Powermad. I think their show will be heavily biased towards that disc. Legacy is a bit of a mix, but still prog metal. Room V is Tyranny part two, so you should expect a lot of that also.