@shiva33: 5210 is not the phone for some serious music.
Well for multitasking, again, symbian is not required. A Java enabled phone can do that easily too with almost 20-30% lesser cost, faster maneuverability than that of a Symbian OS. Symbian OSes are notorious for hacks, viruses, and frequent crashes. Name me one JavaX enabled phone which says "I've got virus, sonny, fix me!". Though they mightn't be vivid in application areas but then each coin has two aspects...go in for xpress music edition and one with symbian 60 OS that way you can multitask too.
Even JAVA OS enabled mobile can do it, easily, whats the deal breaker then over a JAVA OS when compared to S60?multitasking as in you cannot play a game and send a sms without quitting the game on symbian 40 and keep other applications running in back . while you can do all that on symbian 60 just toggle between applications.