Plasma is extremely different technology and doesn't refresh like LED and OLED tvs. 600hz is a theoretical.
Anyway as mentioned the TV you want does not exist. If you want 1ms response you need to go with a monitor. There are no TVs or monitors that run 144hz in 4k, NONE. Right now you're limited to 60hz both through HDMI and even DP because the screen can't do it.
Some manufacturers have just demoed monitors that are capable of 144hz, but again you'd also need the most serious of serious hardware to even drive a AAA title at 144hz at 4k. Again there are NO TV's that can do this or the 1ms response time, TVs use cheaper screens which is why the larger sizes are affordable, they don't need that fast response time.
As a side...