I think any of the cars will work for you. Yes they all have different learning curves but they'll work.
I would say go BMI because that's what I did.
I bought a 12L4 when I got into 12th scale a little over a year ago and it was o.k. But then I got a deal on a used BMI DB12R and absolutely love it! I only changed the rear spring on the shock and the car worked great on our outdoor asphalt track!
I have not had to do any setup changes and will admit I barely do regular maintenance on the car
But it still is just a breeze to drive! Heck I even pulled out a couple of A-Main wins in my first season of racing 12th with the BMI!
And I race with InspGdgt and have seen him beat on his car
and it keeps coming back for more