In a few months I am looking at purchasing a new set of front speakers. Currently I am running Sony SS-F6000's off my Pioneer Elite TX 91. For how cheap these speakers where I am surprised at the sound quality the produce. I am moving those to the rear to replace my Infinity SS-2003's (not sure if this is the model, they are fairly old) I don't need a pair to match the Sony's as I do much more music listening on the front speakers alone. I currently am looking at Polk Audios TSi 400 model. Dose anyone have any better suggestions or thoughts on these?