Buy Home Theatre Systems I Intend To Buy A Home Theatre System.But I Am A Bit Confused By All The?

I intend to buy a home theatre system.But i am a bit confused by all the? - buy home theatre systems

multiple systems on the market. Can someone tell me how much power (RMS not PMPO) buy.So he should get the best results and to what President THD? And no one has heard of una''F & D that makes the brand of speakers?