Im after a Micro HiFi system for my Sons room and have decided on the Denon DM31. I can either buy this with or without speakers. Are the speakers supplied with the DM31 (which I understand are Mission SC-M51is) OK or should I get it without speakers and add something like the Mission M71i which would come to about the same price? The SC-M51s supplied with the DM31 dont look like the Mission M51i that can be bought separately (which cost as much as the complete system!). Thanks for any advice.