Saw this TV advertised for $1296 in todays newspaper not sure how good it is compared to Samsung 55H6400.
I went in store and to me Sony TV was stand out compared to Samsung.
Model: KDL55W800B
http://www.thegoodguys.com.au/buyonline/Sony_55%22(139cm)_FHD_LED_LCD_100Hz__3D_Smart_TV_KDL55W800B
Not sure how trusted rting is in Australia but I found this to be a useful article. What you guys think
http://www.rtings.com/by-size/best-55-inch-led-tv
Not sure about the other features, but it'll definitely be a better gaming TV than the Samsung. Sony's are renowned for low input lag whilst Sammy's are know for the exact opposite.