Nsgarch is exactly correct, unless you will be considering the multi-thousand $ MC's, there are many fine MM's that are worth considering. Some would argue that EVEN IF you will be considering top tier MC's, you should consider a MM. Read this and learn :-)
http://forum.audiogon.com/cgi-bin/fr.pl?eanlg&1200430667&&&/Who-needs-a-MM-cartridge-type-when-we-ha
Another very important point to consider, which further supports the MM
route: In my experience, most preamps' MM section sound better (cleaner/simpler signal path) than their respective MC stage. Having said all that, if yours can accommodate (and you can afford) something like the Benz M2 MC, and you like/prefer the sound of a good MC, that is also a viable alternative. Good luck.
http://forum.audiogon.com/cgi-bin/fr.pl?eanlg&1200430667&&&/Who-needs-a-MM-cartridge-type-when-we-ha
Another very important point to consider, which further supports the MM
route: In my experience, most preamps' MM section sound better (cleaner/simpler signal path) than their respective MC stage. Having said all that, if yours can accommodate (and you can afford) something like the Benz M2 MC, and you like/prefer the sound of a good MC, that is also a viable alternative. Good luck.