I have searched the archives unsuccessfully to what must be a common question. I have a good naim Hifi 2 channel system, and currently watch films through this, with the TV being centre stage. Domestic restrictions prevent a separate 5 channel AV system, so I need to just add some rear speakers - I think. 400 pounds is my budget. The question is this - is there a 1 box approach that includes a decoder and amplifier for 2 additional speakers. If so, do I get an AV amp, or decoder? Are decoders available with an integrated amp for rear speakers. Also , will I really miss a centre front speaker - I don't at present with my 2 speaker set up. I hope someone can shed some light.