Could somebody give me a suggestion for a suspension upgrade...?
I look more into the comfort side...
You would be astonished at the level of comfort -AND- control the SVT Suspension Kit delivers.
$250 at most [FJ]focaljet sponsors.
Eibach's kits are decent, but cost more and may drop you too much for your winter concerns.
If you want some money left over for some great winter tires, then go with the SVT Kit.