I have been looking at purchasing a new 5.1 speaker setup. I have looked at a variety of alternative manufacturers such as Axiom, Aperion, Boston Acoustics etc. Presently I have a 2 speaker setup either side of my Panasonic plasma. The speakers are Wharfedale Denton, purchased a long time ago but still sounding good to me. Can anyone give me an insight into how much better a new 5.1 setup might be....say using Axiom M22's as mains. Thanks