Before going for them ..do audition them if possible , I like QA than Polk , qa is very well known and good brand , still you might not like it.. sound is very much subjective and defer between individuals, it might good to me but not to you..so listen them at first..with qa marantz will be good I auditioned them together so telling you..u might find denon is better.. listen to them with your well known music genre and check what you like most, which sounds better..its not mandatory that you have to complete entire setup at a time..in HT setup once you will be little experienced you will understand.. basic quality is main thing not the features..take time to build the good quality system... Will vote QA over polk.all the best.