You have a 5.1 home theatre setup. You've been very happy with it for a number of years, but now you want to take it to the next step. Improve it. Do you add more speakers and look to Atmos to provide what you are looking for? Or do you stick to 5.1 and improve sound quality? There are a number of factors at play here including the room itself and the type of films you are into, but it's worth noting that Atmos is the same audio quality as the existing Dolby TrueHD and DTS Master Audio sound formats.