rack bushings aren't necessary on the GR/GV chassis. Not like a GD/GC which NEEDS em.
coilover's are nice, but not necessary for so many people.
A good strut/spring combo like suggested is perfect.
I've ran coilovers in a GD and a GR, and while it was nice, it was dialed in once and done. there was no re-adjusting since it was a street car.
Track = different setups per conditions but thats more complicated then slamming it.
OP = good sways (like suggested 25 RCE or 24 whitelines)
good springs (swift or RCE)
Bilstein struts (can't go wrong with awesomeness)
that will be plenty to start.
oh and IT has nothing to do with coilovers ..... OCD does.