There are a lot of threads like this... viewtopic.php?f=9&t=15459
Often it comes down to what skillz you have for fabrication, and how much you want
to invest in your suspension. One coilover setup that seems to tick all the boxes is
made by Fortune Auto and you can read about it on the Battle Version website here...http://shop.battlegarage-rs.com/products/fortune-auto-coilovers-500-series
The Fortune Auto promo stuff shows the various options available, and is here... http://www.fortune-auto.com/apps/blog/show/42474295-new-application-toyota-ae86-in-several-configurations
The price varies depending on whether you want them complete with new spindles,
and if you want coilovers for the rear or separate springs and shocks as per OEM.
I'm not in the business of advising anyone on which setup will be best for them, but
if you are prepared to spend the coin and want something good, the Fortune Auto
setup seems to rate above most other setups in the same or similar price range.
If you are more into the DIY type (height adjustment changes spring pre-load), then
take a look at the T3 offerings here... https://technotoytuning.com/toyota/ae86
Generally speaking, if you want to go down 2.0 - 2.5", as a minimum you should be
looking at cutting the struts 40mm and doing a coilover conversion as covered by the
DIY guide here... AE86 - Convert Front Struts to COILOVERS - TUTORIAL
- by Club4AG
You can use the KYB AGX SW20/Camaro shock combo (I have it and while it is not
brilliant, they do an OK job for the money) and use spring rates around 5 front and
4kg/mm rear to start with. That will be sporty, but won't kill you on rough roads.
Lots of people on here have tried lots of different setups. Once you settle on which
way you want to go, post the combo you are thinking about, and get some input from
the guys who have actually driven the same setup.