OK i am new to this and i am looking for a amp system. I'm on a rather low budget so things must be the cheapest im affraid maybe 2nd hand. i need some advice/help/recommendations on a new system. lets start with the amp i have no idea which to get ive been looking on richer sounds and ebay and not to sure. at some point i would like the system to be 5.1 but maybe just start with 2.1 . i have a pair of quite new panasonic SB-PM28 speakers input power is 70w (HF) 70w (LF). impedance 6 ohms. maybe i could use these and get a centre speaker and sub to start with ???