I put the Blizzak ws-50 195/65 15's on my 99 SVT last year with no problems. I think they call it 'minus one' sizing. The big thing to make sure is the bolt pattern, offset and if the wheels clear the brake rotors. Tire Rack was closing out some Enkei wheels last year that look great. Also look at the yoko Guardex 600, I put them on my Audi this year and have been very pleased, also about $25 less per tire for the same size. Good luck, I know I will always have snows for my cars.
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99 Black&tan SVT
Borla Catback
K&N
Blaupunkt
91 Audi Coupe Quattro (winter fun
68 Mustang Convertible (summer fun)