The next upgrade should be a better table. I'd save up. You can get a notable improvement from one of the medium Regas, or should you be willing to go the used route, a Thorens off of Ebay (some reconditioning may be necessary, but these tables will blow away even the MMF-5). If you can swing it, the VPI Scout is probably awesome, but it's significantly more expensive ($950 w/o arm, $1500 with arm).
After that, the cartridge. I'd think about one of the cheaper moving coils, such as the legendary Denon DL-103 (available for about $160-200 from overseas dealers) or the new Dynavector 10X5 (probably $250 at the right discounted price), either of which will be a significant upgrade from the stock Goldring. Be aware that the Denon will require significantly more gain than your current moving magnet cart - I'm not sure whether your MF provides an MC stage. If not, you should plan on buying a step-up transformer from Jensen or Stevens & Billington. The Dyna is a high-output moving coil and won't require any more gain than an MM cart.
Hope this helps.
Patrick
After that, the cartridge. I'd think about one of the cheaper moving coils, such as the legendary Denon DL-103 (available for about $160-200 from overseas dealers) or the new Dynavector 10X5 (probably $250 at the right discounted price), either of which will be a significant upgrade from the stock Goldring. Be aware that the Denon will require significantly more gain than your current moving magnet cart - I'm not sure whether your MF provides an MC stage. If not, you should plan on buying a step-up transformer from Jensen or Stevens & Billington. The Dyna is a high-output moving coil and won't require any more gain than an MM cart.
Hope this helps.
Patrick