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As noted, if you aren't anal about what tires you get, the local shops are generally competitive because you don't have to pay freight and they often install the tires you buy from them for free - this typically amounts to a savings of $80-120 on a set of 4.
If you live in an area that gets a reasonable amount of snow or cold weather, snow tires are a great investment. If you rotate your tires winter and summer, the cost is marginal, since both sets last twice as long. It always amazes me that people scoff at the cost of snow tires, yet they can be had for less than the price of the typical insurance deductible. They will singlehandedly make the biggest difference in being able to handle winter roads safely -FAR more important than 4wd or AWD, that's for sure!
If you do go with winter tires, Tire Rack becomes competitive - as you should have them installed on a second set of wheels. This will save you $50-100 or more every year over paying to have the tires mounted and dismounted on 1 set of wheels. Don't tell me you don't have time - this can be done for nominal charge during any oil change.
Lastly, NEVER install snow tires on just the front of a FWD vehicle. They MUST be installed on ALL 4 wheels!!