The suspension thread is a good place to look:
For example.
http://www.ft86club.com/forums/showthread.php?t=55813
Not too much is missing from this thread:
http://www.ft86club.com/forums/showthread.php?t=45554
Related to winter:
http://www.ft86club.com/forums/showthread.php?t=55219
If you intend to drive your car in winter be very careful how much you lower it, the factory ride height is good. Also, you want to be very careful about how stiff you make the suspension, stiff springs, roll bars or damper settings all create problems in winter or in the wet.
Finally, somewhere in that topic there's good advice about the bump stops fitted to the factory coilovers (they are technically factory coilovers, just with no spring perch adjustment.). Some aftermarket coilovers come with comparable bump stops and dome do not. Changing out the factory bump stops will make a significant difference to how these cars handle. Be careful what you think you want. Suspension design isn't for amateurs. Even the best aftermarket suppliers cannot best the factory boys. Buy only from a reputable aftermarket supplier like KW, or Bilstein. The factory is supplied by Showa, I believe and KYB are an excellent manufacture from Japan. I don't know if any Japanese major supplier is making aftermarket shocks or coilovers for these cars.