Hi everyone, I'm new to the website and learning a ton thanks to everyone and all the info on this site. \n\nI am upgrading my very old sony 5.1 in a box system from 2005... And with my budget i have come up with the following..\n\nReceiver: YAMAHA RX-V6A 7.2-Channel\nCenter: MK442 Dual 4" 2-Way Center Channel Speaker\nStereo: MK442 Dual 4" 2-Way Center Channel Speaker\nSurrounds: going to use my satellite Sony's i have currently. till more money to upgrade.\n\nbut what sub should i get.? I am looking at two subs, but open to others... currently thinking ether \n\nKlipsch R-120SW. $399\nor\nMonolith M10-S 10" Sealed. $499\n\nis the monolith overkill for a small room? \nroom size 20feet length x 12feet width\n\nThanks in advance !