Kurt's suggestion is sound to first upgrade the turntable and tonearm. These two components are the essential foundation to good cartridge performance. The VPI Jr. is one option, but if you have the money, the VPI Scout with the JMW 9 arm is a superb package for the money.
There are some very good moderately priced cartridges on the market today, but at discount price, it's pretty hard to beat the newest version of the Shure V15xMR. It can be purchased new for $250-275, and at that price, I personally don't think there is another MM cartridge that comes close in overall performance.
There are some very good moderately priced cartridges on the market today, but at discount price, it's pretty hard to beat the newest version of the Shure V15xMR. It can be purchased new for $250-275, and at that price, I personally don't think there is another MM cartridge that comes close in overall performance.