Cartridge advice needed, dynavector 20xh now what?

Hello, I am wondering what cartridges would be a big step up from my Dynavector 20xh without breaking the bank. I won't specify a price other than below $1500 retail new and hopefully less. I purchased the Dyna 20xh to use with my Spacedeck/Anna tonearm because I only had a mm phono pre built in my DK Design amp. I have since picked up the new Eastern Electric Tube Minimax phono pre that has mm/mc low & mm high inputs. I am loving vinyl & my setup. I wonder how much better things will get if I upgrade the cartridge end of things. I would continue to look within the Dynavector line but also hear an awful lot of good things about ZYX cartridges. At this point I am really just hoping to hear suggestions from users or different MC carts who could give me an idea on the range of improvement to be expected. I haven't played a cd since I got the Spacedeck spinning. I have been buying vinyl every week & having a blast. Thanks again for all the help along the way.