E53 3.0 owner, going to E70 3.0 - Advice?

[Wayne's World]

Now before you all chime in - I do WANT the 4.8 but i'm seriously looking at a 2007 3.0 because it's got everything I need (3rd row and rear DVD) for under 30K w/42K miles. It's a 1 owner off-lease. I'm not necessarily in a rush but I do want to offload my E53 because maintenance is coming due and I'd rather not spend the money as I know I want to upgrade this year.

I love my E53 X5 and think it is the best overall vehicle I've ever driven. I've had a few bimmers before and plan to stay loyal. Nevertheless, I've heard some less than flattering things about the E70. To date, the major issues I've seen on this forum and Bimmerfest is

1. N52 motor and defective head/exhaust valves. Reference SIB 11 09 07.

2. Hesitation issues - caused by either faulty knock sensors or faulty auxiliary fan relay.

3. Battery drain - for a number of reasons but primarily because the alternator isn't up to the challenge of the high-tech toy that is the E70.

I plan on picking up an aftermarket warranty either from the dealer or outside. I like NAC so far but I've also heard good things about WarrantyDirect. I'm a DIY'er but it's getting old! (and so am I) and if either 1 or 2 listed above do come into the picture, I'd like to have it.

So with that said - any other things I should be on the lookout for from current E70 3.0 owners?