Do some research.

With tires the issue is that you pay a fixed rate for mount, balance, and disposal that is a pretty healthy portion of the cost of hte tire.

Buying a more expensive tire with a longer treadlife / durability to withstand road hazards might be a bigger bill on day 1 but if you get 2 extra years out of a set of michelins vs nokians was the extra $250 on a $800 worth it?

Personally I find the sweet spot is usually in the middle. Cooper touring tires have a great reputation and while michelins are lightyears better in terms of noise and snow performance the price tag is steep.