Thermostat recommendation.

So can someone tell me what thermostat I should get, 160 or 180.
I was leaning towers 180 but I'm not sure as I'm not savvy to these things.
One more thing, I looked to buy one from Jegs (Summit as well) and see that Milodon makes a nice stat that also is way more expensive than the others, (30 dollars or so) but it's reviews seem to be almost 5 stars (out of 5) so I'm leaning n that way @ 180 degrees, any thoughts from the "Go to Guys" ?
Thanks.
MAPS