Kaoskingnd

I've been lurking in alot of forums for about three months and still have not found a realy comprehensive thread on Rims for a 1990 300 SEL (126)....I would like to see my car with a set of AMG or replicas in a 18" in the back and 17" in the front with a Nice set of progressive springs or other suitable substitute that will lower it about 2" in the front and 1.5" in the back....very mild just enough to ease the gap. I did this on my 2000 maxima and it was like a whole new car....will this also work on a long wheel base like mine?
Any help with finding and fitting would be excellent.....I do like KLP 92's rims

Thanks in advance