Currys and PC World both offer HDMI cables priced between £19.99 and £119. A statement from DSGi, which owns the two chains said: "We always aim to help our customers find the right product for their choice of hardware by clearly explaining the differences between the cables and our staff receive training on these products."The choice of HDMI cable is mainly determined by the level of signal purity that the consumer is looking for in the connection between playback device and television." The company said that some cables were more expensive than others because the materials used in them, such as copper wiring, were of a higher quality. One expert who supports that claim is Chris Jenkins, tech labs manager for Future Publishing group, behind Home Cinema Choice. He argues that more expensive cables do make a difference, especially in more complex home cinema setups and over cable runs of longer than one meter. "As you connect more and more items together, say an HD box and games console, or multi channel amplifier, you will need better and better quality cables to maintain the quality of the signal."£120 cable for your first purchase no. But certainly don't try to get away with a £1.99 cable" Chris' advice is to budget around 10% of a system's price for HDMI cables.