Mike,
To make suggestions, we need a little more detail. What kind of driving do you do? Specifically, do you just drive on the street, run auto-x, do any track days on a roadcourse, how hard do you push your car, does it rain a lot where you are and how long do you expect your tires to last? Do you have dedicated winter tires? What is your budget?
Go to
http://www.tirerack.com and you can compare all kinds of tires, read reviews, get specs, pricing, etc.