Dear Parvenue: Everything is important to achieve a good quality level performance, the important subject could be to choose the best/better trade-oofs to achieve a good balance/synergy on your system links.
My advise is that on cartridge choice you can go for a MM cartridge that are very good performers for a very fair price, example: you can get right now one of the best MM cartridge ( better than any of the MC ones named here ) here: http://www.audiogon.com/cgi-bin/cls.pl?anlgcart&1226880237&/Audio-Technica-AT-150MLx, and this is not the only option. Please read about here:
after the cartridge try to put your money ( as much you can ) on the phono stage and don't worry about LOMC cartridges.
Regards and enjoy the music.