I had a 89 300se and to this day I am sorry I did not keep it.
Even with the 3l. motor there was plenty of power, you just needed a firm right foot. It had only one problem, the AC had a leak noone could find, and that was the reason I finally sold it off.
I got it with 75k miles and put 40k more on it.
The motor is the same as the 300e series and parts and service are a snap. The 8cyl motors are a little more demanding.
Good luck whatever you choose, but always remember, its a used car!

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John
92 500e, 85k, silver/gray,all stock.
96 Club Wagon,Hypertech chipped( College Hauler)
97 320 SL 50k
1980 BMW e21 323 Baur conv.
1990 300GE 99k