New shock mounts, new bump stops? other miscellaneous components that will be accessible while its all apart? Should I stick with OEM or is there a cheaper better alternative? Car has 116k. (06 IS250) I feel like the car rides on wooden wheels now, after doing some reading I'm suspecting the shock mounts but I'm not sure, i have never done a suspension change nor do i know how integral all of these parts are. My setup will be Koni FSDs and Eibach Pro springs in case anyone was curious.

 

Might want to check out your front lower control arm bushings and all 4 sway bar end links for excessive play. bump stops don't need replacing unless yours are falling apart. I would however replace all 4 upper strut mounts while youre at it.

 

i got some MOOG front shock mounts with my purchase. he said to look on Rockauto for tie rod ends and ball joints too. I looked for rear shock mounts and didn't see any, but they have rear "strut mounts" same thing? also, i couldn't find upper ball joints for the RWD, does it not have it? here are the parts:
(FRONT SHOCK MOUNTS)
https://www.rockauto.com/catalog/mor...nid=380&jpid=0
REAR STRUT MOUNTS)
https://www.rockauto.com/catalog/mor...nid=381&jpid=0
(TIE ROD ENDS)
https://www.rockauto.com/catalog/mor...id=386&jpid=24
(BALL JOINTS)
(FRONT LOWER LEFT)
https://www.rockauto.com/catalog/mor...id=387&jpid=14
(FRONT LOWER RIGHT)
https://www.rockauto.com/catalog/mor...id=387&jpid=15

What is categorized as excessive play?