Great info on AM reception. I wish more manufacturers would supply a quality AM section for us sports and talk radio junkies.
I have used thge C Crane antennas an had very good results. Also McIntosh built a very high performance AM section in their MX130 and MX132 PrePro's. I do not know how good the current generation is. A crucial part of these processors was the amplified remote AM antenna. If you can find one (McIntosh did not sell it seperatly) this makes the best AM antenna I have ever used.