I need advice to buy a laptop, I use my laptop mostly to watch HD movies so I want my laptop to have a nice display and sound

So I've checked some Lenovo laptop and I'm thinking of buying Lenovo Z400 touch or Lenovo Y400

the Lenovo Z400 is tempting due to it's touchscreen
but the Lenovo Y400 is also tempting due to better graphic and maybe sound since it use JBL speakers but no touchscreen

so what do you guys recommend? which one should I buy?