Hello all, newbie here. I am trying to take my surround sound to the next level and as a poor college student have limited options. I currently am running a JVC Rx6000 reciever with 4 Polk RM2300 SAT series speakers and a same series center speaker plus a good subwoofer. As far as clarity and definition for movies which would be a more noticeable improvement... adding floorstanding tower speakers for the front two channels, or getting a new reciever? I'm thinking of getting the floorstanding speakers since these satellite ones are pretty small (but they sound great). Any input would be appreciated. Thanks!