Well... where shall we begin...
Those are vastly differant cars.
Lets start of by saying, BMW V8's are fanfscken tastic, from old to new.
THe 7 is a much "nicer" car then the 5, but the 5 is far superior over the 3....
They are both incredible though, my money would be, in terms of economy and luxury, the 730d E65... POST 2004/09... pref try and get a facelift which is post 2005/03
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