Saw it on the weekend and listened in a very busy environment so I cannot comment accuratly on its sonics. The dealer reported that its list price was only $100 (Canadian) over the previous model so it would appear that given its reported advantages of the older Planet you are getting a good deal for your dollar. It looks sturdier if anything. As I am unfamiliar with the 508.2 and your system for that matter, I'm not sure what will better fit your system. Try before you buy...
