I'm at the same point. My 04 e53 has 168k on the OD. Its been rock solid but has had some significant work over the last two years with more to come no doubt.

I drove the e70 m last week, a fully loaded one. Incredible ride, power that rivals my 911 turbo, well thought out. The dealer is putng on new tires and I hope to pick it up Monday.

Once you've driven one, its all you'll think about. I know that was true for me ☺

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2004 e53 3.0
2014 f15 50i
2002 911 Turbo