For straight-up AM, GE makes a "Super Tuner" large portable / table-top that's has great sensitivity, and excellent tone (AM or FM, FM stereo to headphones/external speakers).
I think Amateur Electronic Supply (AES) still carries them (
www.aesham.com), thay also carry the CCRane, Sangean, Sony ... others).
I think the CCrane is ~US$150.00 or so, the GE is ~50-60.00.
Both support external antennas, both have very good sound quality. The GE has a larger speaker set. Both run on "D" cells or AC power (attached/included cable).
The CCrane also has weather and TV (broadcast channels) audio. I believe the CCrane is a Sangean-made radio.
For the money, I like the GE ... performance-wise, I can't believe the CCrane is $100 better, but it does give you the extra bands.
GE Radio from AES
Good Luck
Scott