Almost any 15-inch tire should fit on the rim. There might be a few
competition tires or ultra high performance low-profile tires that
don't fit, but almost any 15-incher off the rack in a tire shop should
fit.

However, you should always keep the rpm of your replacements tires, and
thus the accuracy of your speedomenter and odometer, as close as
possible to the original size. That's why I suggested 205/65, 195/65
and at a stretch 225/55, if you can find it.

There aren't too many standard 15-inch tire sizes left. If you want to
save a few more $$$ and maximize winter traction at the expense of all
else, you can try 185/65/15, though I would not recommend it. That's a
pretty narrow tire for a mid-size sedan. It would also throw off your
speedo enough to notice, though not drastically.

About the only size you should definitely avoid is 185/60/15. That
would throw your speedo _way_ off, and makes no sense in general. You
would be dropping three sizes in width and not changing the aspect
ratio, which could mess with handling and maybe braking.

Rules of thumb:

Wider/lower is better for handling, cornering and hard braking
Narrower/higher is better for winter
Higher (aspect ratio) yields slightly better ride comfort

To calculate reasonable replacement tire sizes:

http://www.1010tires.com/TireSizeCalculator.asp?action=submit&reset=yes