Hi I just bought some Monitor Audio Silver 6 (https://www.soundstageaccess.com/index.php/equipment-reviews/574-monitor-audio-silver-6-loudspeakers) to replace my wharfedale diamond 9.1 i got a good deal on them i think cost me £250 now i thinking of using the wharfdale as rear speaker in a 4.1 set up the wharfdale wont be to big as rear speakers will they ?