Turntable upgrade, tweaks, or stay put?


I have a music hall mmf-7, stock with goldring eroica and project speed box. Rest of system: Wilson audio Sophias, Musical fidelity KW 500, Musical fidelity Trivista DAC, and Musical fidelity CD player. I really enjoy the mmf7 and have no real complaints. However, I know it is the weakest link in my system. I wonder how much better it could be. Do you think I would have to spend $5-6000 or more on a new tt to get significantly better sound? Any recommendations? Or would some tweaks be smarter? Or just save my money and buy more records? Thanks in advance. As I said, I like my mmf7, but wonder if I am missing out by not having something of similar quality to the rest of my system.
arsh
For motor shaft lubrication use a VERY light oil. Sewing machine oil works really well. To apply, see if you can get a hold a hypodermic needle which will allow you target the area of lubrication.
I got the scoutmaster set up with a soundsmith zephyr. Will let it break in for a few days, but it already sounds good. Will keep you all posted. Thanks a lot!
Arsh ... the Zephyr is my back-up cartridge. It's a very nice cartridge and was supposedly jointly designed by Peter Ledermann of S-S and Harry W of VPI fame. I think you are doing quite well.
If you keep the VPI or decide to find one of your own, they really like a solid platform to sit on. I thought my Scoutmaster was solidly supported on its own VPI 4" tube-steel and steel bar stand loaded up with 100# of lead shot and kitty litter. The stand, spikes and fill and components on the two shelves came to > 250#. The whole thing set up on brass spikes sounded very good, but did not really take off until I put a maple block isolation platform under it. I got a great deal on a Titanic maple cutting board from dawnsplatforms and some Mapleshade blocks. The 27"x21"x4" monster adds another 65# to the setup, and the sound went from excellent to glorious. It also looks fantastic.
Thanks for those comments. I have a couple of questions about the Zephyr: 1) how long does it take to break in; and, 2) do you have any suggestions on setting the arm height on the scoutmaster with the Zephyr?
Thanks in advance.