You must have paid a fortune for that new motor? You won't really get a lot of that $ back when you sell/trade. You can now drive the X trouble free for another 75k miles.

The E70 is a step up in a lot of ways but the price point is also a step up. The CPO is definitely a selling point, but the depreciation will kill any cost savings from CPO repairs. CPO is worth a lot in "peace of mind".

Without knowing the exact costs it is hard to say. My personal feeling would be to put some miles on the new motor and enjoy it for a while. If you have $ falling out of your ears then go for the E70.

Thanks for the compliment... You could always go for a 4.6 or E53 4.8.

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2002 X5 4.6is - Titanium Silver / Black Alcantara - Dinan Stage 2 - Bilstein/Eibach - Brembo BBK ----SOLD---
1993 318i - Brilliantrot / Tan - bone stock daily driver