im prob going with a 5mm or 8mm spacer, but what kind to get.
ive heard certain type of spacers can cause vibrations, idk anyone runnin spacers? or can recommend what type

 

You'd want to get something that is hub-centric to avoid vibrations. However, to the best of my knowledge, no one makes a hubcentric spacer that small. You can check with Mike at Touge Factory for the Ichiba ones. Another option is to get a custom set made by JM Fabrications for $100. GL