HDMI 2.0 should be Rs 200 to 300/m, HDMI 2.1 may cost more( hdmi cable are mostly backward compatible if your avr or tv support 2.1 then you can go for it) ( but i did not buy any hdmi cable i have one with my old 4k tv and one with my zappiti media player and those are decoding 4k and atmos fine, my tv does not support dolby vision so never tested), speaker wires i used amazon basic 14awg wire for my right/left/center 3 speakers and 12awg wire from auditro at same price Rs 60/m for my surround and atmos speakers(i have a small room10x12 ft). Sub as well I am using amazon basic rca cables for subwoofer( not invested on other high end cable they are very costly, if i need to repositioning my sub will use a Bluetooth module like svs soundpath wireless adapter later)