If you want something with good hardware support for Linux Lenovo is always my first choice. I have a Thinkpad x220 that runs Linux flawlessly. I've also got

If you want something with good hardware support for Linux Lenovo is always my first choice. I have a Thinkpad x220 that runs Linux flawlessly. I've also got an ASUS UX305CA which isn't too bad either. The brightness controls didn't work out of the box, but I've got it all working now. It's thin and light, comparable to a Macbook Air. I use it as my personal development laptop. Easy to take anywhere since it's only 13 inches, but it has a QHD touchscreen so there is plenty of space to have multiple code windows open at the same time. Battery life isn't too bad either and it's cheap (about $700 USD new).