Keep the 40’s IMO the heritage are not worth the price to upgrade. I traded my 40’s for the heritage and I am thinking of selling and buying another pair of 40’s. I am using a passlabs 250, so it’s not an amp issue. I will say, the heritage is more transparent than the 40. In my room the 40 has a much puncher and impactful bass, that I miss. The Heritage is also ruthless to the source. Besides the Transparency the heritage has a much large soundstage then 40.
