You potentially don't need to buy anything - if you have exsisting cables and everything looks OK with those cables stick with them.
If you are starting from scratch!
Which Sources do you have?
Do you have an AVR or Soundbar in the system?
How long a cable do you require?
Joe
Thank you appreciateAt 2m most HDMI cables will work - you don't need to spend much on a short cable £10 is likely more than enough.
For a bit of extra piece of mind look for the official High Speed or Premium High Speed logo/labels - HDMI :: Manufacturer :: HDMI 1.4 :: Finding the Right Cable
Joe