Face off

I'm in the market for a new car and I'm torn between staying luxury or going economical.  I thought about a Toyota Prius but I heard the car accelerates instead of braking, so I'll pass.  I've been wanting a wagon for as long as I can remember and I've narrowed down my choices between the BMW 3 series wagon and the Audi A4 Avant.  It's a toss up between these two cars at this point and I don't know what to do.  Both cars serve the same purpose.  Both cars are aesthetically appealing to me.  What should I do? Thoughts?