tempted with 540it
 

..to go with instead of s4 avant. should i have my head examined or are they comparable?

Not if you want AWD

same shoes
 

I had an S4 avant briefly. My mom has a 525iT which I use alot too.

The 5 series has a more useful trunk in my opinion. I can have 4 suitcases standing and still have room to toss a few soft bags on top. The passenger space is much much better than the S4, esp with the huge recaros in the front.

I dont know about if you are going to compare the V8 motors in them, but I always felt the 525iT was enough for my daily driving ard and hauling duties.

5 series AWD is coming.

Comparable. Both great cars.

my mom has a 540it, its fun but not
 

like the S4 IMO - the 5 has a little more room than the Avant ( I have a 528it too) - the S4 is faster - big downside to me on the 540 is the lack of a 6MT.
the new 5er is ugly IMO and thats part of the reason I now own a S4 Avant.