Not a high-end machine, but my wife recently got an x140e for peanuts (< $300 for the laptop during the XMas season sales, plus ~$150 to upgrade to an SSD + 8 GB RAM). She was upgrading from a Chromebook and decided that Linux fit her immediate use case better than Windows. My only guidance in this was, "plug in an ethernet cable during installation."
Every single piece of hardware--touchpad, sound, webcam, suspend, wifi, etc.--worked out of the box.
This machine is solidly built, and reasonably attractive. I'd say the thing that dropped the price was its weight. Functionally, it's easily a replacement for my MacBook Air or better. Physically, it's like three MacBook Airs stacked on top of each other.
Sorry, forgot to mention linux distro. She is running stock Ubuntu 14.04 with Unity. Unity might get some hate from some segments, but seeing a novice user take to it with zero guidance was illuminating to me.