a 40 dollar grado black will sound its best there. a shure m97xe will and so will an AT440ML. once the cost of the table is no longer making you reel, and your finances are coming back into shape, consider the high end cartridge that interests you.
the following is my system:
http://cgi.audioasylum.com/systems/588.html
as you see, the mmt is my arm. i have no qualms about upgrading to nearly ANY level of cartridge, but finances will limit me to perhaps an ortofon Kontrapunkt b, but i wouldnt hesitate to aim much higher.
yeah, a fixed headshell would likely improve things ultimately BUT not from an ergonomic angle. PLUS i dearly love to swap cartridges at will.