Hi Guy's. I've recently started acquiring bit's for my home cinema setup but need recommendations on either 2 rear surround speakers or 2 front surround speakers. I will prefer to save some money and buy second hand and keep the cost down without buying rubbish. So far I have Sony STR-DN1080 as a receiver 3 x Monitor Audio Radius 180's as left, right and center (but could possible use left and right for rears). And a BK XXLS400 for the sub. What do you think?