yes sony z1 has one of the top of the range tn panel
and still not slow for today's standard if you got a 64*4zif raid0 and PLUS it still work today
anyway z1 is a very good laptop and do not forget it's 6 years old now!
i used to have a black one (z129/127 CTO??) bought at cheap price, sold it and now regretting...