I will second those Dunlop D60 A2's. I have them on my 88 Formula and they are very good in dry and wet conditions. I cannot give you an honest opinion about snow, since I garage my Fiero in the winter. However, due to their great wet weather performance (IMHO) I think they would be adequate for winter driving. Just be careful because they are wide!
AS for the Cooper Lifeliner Classic II's, they are also very good. I had a set of these on a 1991 Ford Probe and was very pleased with them. Very good on the highway. Either is a good choice, but the Dunlops will give you more all-out performance and grip.
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1988 Fiero Formula