I am looking to replace the Jamo 305 front speakers that came as an all in one package with something a little better at handling music as well as movies/tv. All recommendations are greatfully accepted. Should I replace the centre as well and leave the two surrounds or replace the whole package? I don't really want to break the bank but don't want to make a mistake either and end up with a system sounding flatter than it does already. Jamo 305 speaker Jamo DVR50 player Sony STR-DB790.