Hi. I want to add surround sound to my living room at a reasonable cost, however I seek clarification on a few points: 1 - since I already have a decent dvd player, I have no need for an "all in one" home cinema kit, just the speakers and decoder/amp. I've been looking at some reasonably priced 5.1 systems and from what I can see they only have one set of L-R audio inputs at the back. What I wish to ascertain is whether the audio from everything will go through the new speakers - i.e. from tv, digibox and dvd. If so, how is this done since there's only one set of inputs? 2 - what is RMS? For example - I was in Currys yesterday looking at an LG and a Yamaha TSS-10. To my layman's eyes the Yamaha looked the vastly superior piece of kit (it was also twice the price), however according to the specs the LG had 400W RMS to the Yamaha's 70W RMS. I had assumed that the higher this figure was the better the system would be. The salesperson wasn't able to give me much help on this score either. A link to the Yamaha is here...http://www.yamaha.co.jp/english/product/av/products/ht/tss10.html 3 - a friend of mine seemed to save a lot of money by buying a Creative system. Since it's intended for PC use it doesn't seem to be as powerful as others, but it still sounds great (my living room is on the small side so I don't think power is a huge issue, but feel free to correct me if I'm wrong!). Since I could get a top grade PC speaker system (+ decoder) for the same price as a low grade "non-PC" system, would it be a good idea to go this route? For example, there's currently a very nice 6.1 Packard Bell system on sale in my local PC World for 139 (down from 300 or so)... 4 - Dolby Pro Logic II seems to me to be a clever feature (producing 5.1 surround sound from a stereo feed). Is it something that should be essential in a system? 5 - when looking for such a system, what are the key things to look for? What features differentiate a "good" buy from a "bad" buy? Thanks in advance for any advice - I'm sure some of my questions are beginners' level stuff but I just want to make sure that when I make my purchase it will give me good service for a number of years.