Yep, I agree, these are excellent indeed and fantastic productions. I'd also recommend folks check out
Dimension X and
X-Minus One, two wonderful sci-fi radio series from the 50's, which included adaptations from some of the great sci-fi minds of the day - Philip K Dick, Ray Bradbury Kurt Vonnegut and Issac Asimov... Both series have been archived and made available for download as excellent quality mp3's
X Minus One Dimension X