To me, the 150$ is well worth the 120hz display, extra battery life, and active cooling fans (if you push it hard enough to activate them). Also, the option for dual monitors is cool, and you have an hdmi port on the Pro. They also have better resale value (at least here in Canada).

Edit*: you also have more GPU cores, which is nice for any video editing, modelling or gaming, if you plan on dabbling there at all.