20's An Dropped?

[Crime Scene 954]

Ok i have 20" HP rims on one of my is300. YES i know i shouldnt have went bigger than 19's.... but i got them brand new for dirt cheap an im going for only a luxury look on this one. (95 sc400 is the play toy) I think the car needs a 1.5" drop atleast in the rear...I was told to be prepared for cambers an adjustable springs....is this a good suggestion to get that "tucked" look??? Im not scrubbing at all (i know your assuming that) an the shop said the rear can go 2 inches easily without any scrub. Help me with constructive criticism to do a good job....please keep sour comments about 20's to your self

[apt]

I won't lower more than 1 inch because once the springs settle you'll be at 1.5-2.0 inches. 20" is a good size because tires are cheaper. Good Luck