Hello guys! I am about to buy a new set of home cinema and I am considering the following: AV Receiver: Marantz SR7500 Front: Monitor Audio GR20 Rear: Monitor Audio GR10 Center: Monitor Audio GR Center I 'd like to know how this specific receiver will drive this speakers, Will the future-buy of a power amp be necessary? My room is ca. 20 square meters. Any opinions will be appreciated! Please help, 'cause I have to move real fast.