$249 ARM Samsung. I'm using crouton for a chrooted Ubuntu when I need to do things in non-ChromeOS land. I code HTML5 and Go stuff on it.<p>Also a Series 5. I've coded and presented at confs from it.
Dual booting Ubuntu 13.04 on the Samsung ARM Chromebook with XFCE as my window manager. So far it's been working well as a machine to get work done when I'm away from the desktop. I rarely boot into the ChromeOS side, though.
I have the $200 Asus. I like it. I installed Ubuntu on it. I basically just use it for a portable/travel computer that I could also program on. I can easily pick it up and go skype or browse HN since I don't have an iPad.