Dear Vinyladdict: I own all the cartridges you name it but the 77i, I own the P77.
If you really want something better IMHO these are better options than the ones you ask:
http://cgi.ebay.com/Azden-YM-P50VL-Brand-New-in-the-box-Never-used_W0QQitemZ260551502693QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item3caa146b65#ht_500wt_975
http://cgi.ebay.com/YM-P50E-Brand-new-in-the-box-never-used_W0QQitemZ260551507298QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item3caa147d62#ht_500wt_975
http://cgi.ebay.com/Ortofon-M20E-Super-MM-cartridge-M-20-E-Super-NOS_W0QQitemZ400085013949QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item5d26ecd5bd
http://cgi.ebay.com/Empire-1080-LT-1080LT-T4P-cartridge-NOS_W0QQitemZ400101138353QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item5d27e2dfb1
Regards and enjoy the music,
Raul.
If you really want something better IMHO these are better options than the ones you ask:
http://cgi.ebay.com/Azden-YM-P50VL-Brand-New-in-the-box-Never-used_W0QQitemZ260551502693QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item3caa146b65#ht_500wt_975
http://cgi.ebay.com/YM-P50E-Brand-new-in-the-box-never-used_W0QQitemZ260551507298QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item3caa147d62#ht_500wt_975
http://cgi.ebay.com/Ortofon-M20E-Super-MM-cartridge-M-20-E-Super-NOS_W0QQitemZ400085013949QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item5d26ecd5bd
http://cgi.ebay.com/Empire-1080-LT-1080LT-T4P-cartridge-NOS_W0QQitemZ400101138353QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item5d27e2dfb1
Regards and enjoy the music,
Raul.