What screen should I buy for my computer?

My computer screen broke and I need to replace it. It is touchscreen and I don't wanna lose this function so I'm not sure about what screen I should buy.
My computer is a Lenovo EDGE15/i7-4510U/8GB/1TB/W8.1/15.6"/REF.

I have found these screens on amazon:

http://www.amazon.com/...019IGBN20/

http://www.amazon.com/...B010GGJ7B0

What one should I buy?

Depends if it's just the glass or the digitizer

I think you should not guess at what you need… Time to take it to a repair shop…