I am just starting to get into home cinema, and am looking for some advice on the following points. I have recently bought the KEF KHT5005 speaker package that comes with the PSW 2500 sub. Will this be designed to work with the speakers more effectively than a different sub. I already have a REL strata 3. Would it be better to stick with this, as it is a better sub? I bought the package because I liked the speakers performance & looks (experienced at various shows) and thought the whole thing would work better together. Will I infact notice a difference at all? Does is also depend on what other equipment I have? I don't need 2 subs, so I need to decide which one to sell?