stablemate for the 4.6is - E39 or E38?

[c4racer]

So I'm in the market to replace my G37 sedan with something up to around half the cost and since I am very fond of both platforms, I am considering both the E39 530i / 540i / iT or a 2000-2001 740i sport. The vette is my daily driver during summer months. X5 used to be my 4-door back-up and winter driver, but due to a change in circumstances my wife now needs to use it during the week for kid car-pool duty.

Currently I am looking at 2 specific cars and having a hard time deciding. Thought I would take opinions from those who have owned or own one of these cars.

First is a 2003 540iT with 78K miles. One owner, CA car. Black.

Second is a 2000 740i with 89K miles. I think 2 owner. Sport package. Anthracite.

I'm leaning towards the wagon because with the loss of access to the X5 during the week, that gives me the best flexibility for hauling around my musical equipment and my bike.

But I really love how the 740i rides on the freeway, and I'm also looking for a nice family road trip car. Even the short wheelbase 7 has more backseat space than a 5 series, and a nice big trunk. I can still carry my drumset in one, just means it goes in the backseat instead of in the hatchback area of a wagon. So it will still work from a utility standpoint, and I do still have access to the X5 on evenings and weekends. almost like custody? haha..

Anyway - E38 seems a bit scarier from an electrical problem standpoint. I know the drivetrain is basically the same between the two and same issues with cooling system, etc. Plus this car is 3 years older and has 12K more miles on it vs. the 540iT.

Any thoughts? Which car makes a better stablemate for a 4.6is?