What laptop you are using for development? What would your suggestion for me?

Currently I'm using dell core i7 & I'm mostly using phpstorm, xampp, workbench, chrome and illustrator.

Currently using a macbook with ubuntu at work, works quite well with phpstorm

Well... The first question I have is why? What do you need that your current machine is incapable of doing?

What? You already have the machine you need.

Because my girlfriend is currently using my Lenovo Y700 I'm looking for something like a refurbished T440s (around 400€) just to throw Linux at it and use it for coding and LaTeX stuff and presentations while I'm not at home with my Desktop.

I went with Mac Book Pro 13.3 inch. And the development experience is just wow. Let's see what it brings in future.