Just thought I would add that I did purchase the AT150 as a replacement cartridge.
It is wonderful but I cannot say the overall improvement is all in the cartridge as there have been many upgrades to the system since I last posted.
My main reason for upgrading the cartridge in the original posting was because other sources sounded superior to vinyl.
This is in not the case any longer as vinyl is easily competitive with other sources of playback.
I can recommend the At150, but with a caveat that I have also upgraded cables,connectors, and amplification since the first posting.
So the overall improvement could be a combination of all of these upgrades and probably is but the improvement gained by the addition of the At150 is worthwhile in my books.