winter tires for C6?

The time has come to replace the original tires on my 06 coupe (Z51). I am thinking of taking a few winter (all weather) trips this year, and having
discovered how poor the original tires are in snow and cold, I need a recommendation for a set of tires that are all weather and run flat. And a bit less expensive that the Goodyear's?
Any thing out there?
I'll re-buy the performance tires later (with another set of wheels)..........

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