Speaker cable. Now where to begin.
The system you discribe is not strictly Hi Fi you know. It should be described as an audio visual set up. As such it employs a lot more speakers than the two normally associated with HiFi. This means a lot more cost. For me the main part of any system is the software if you like. I knew a person who owned a system which cost a lot. many thousands this relates to. He only had a few records which he threw on the floor. He was constrained by his Hi FI not pleasured by it. I suggest you cosider your budget first. Say you have just a few pounds to spend, but 5 speakers to wire. You could do worse than use the speaker wire Argos sell. This would leave you with money to spend on films or CDs. If you feel you have a little more to spend then try going to your local dealer, they would be delighted to see you. However a word of warning, dont get dragged into a listening room to hear the latest thing. Remember the software is more important than the hardware. They should have some used speaker wire they will gladly sell. If not then a good rule of thumb is to buy QED or TCI if you have a little more mooney. I use DMN myself which is quite expesive so this is not a good example. I also have some TCI cables which were described in a review as rubbish. They are actually excellent well comparable to the DMNs but need a lot of burn in time. Like weeks. So dont rush to condemn then rush out and buy the b52s first record and forget Hi Fi.