Questions - returning to analog

I have some basic questions and am seeking some recommendations:

I am steadily upgrading my old college system (Yamaha receiver, Von Schweikert monitors, Sony CD changer), and have now running purchased Maggie 3.5's driven by Plinius 8200 integrated w/ internal MM phono stage, HHB pro recording CD for digital.

I have not yet upgraded my analog gear. I have an old Technics SL-BD20, and as an interim step before buying a better 'table have purchased a new cartridge on the cheap (due to Technics P-mount arm).

Question 1: New cart has much better high end than old Shure M94P, but also a lot of sibilance especially with cymbals. Hi-hats sound like spitting, breaking glass. What causes this? When I increase tracking, sibilance seems to reduce...but sound is less animated, seems muted and strained. It is currently unlistenable and am not ready to use it as a frisbee yet.

Question 2: I'm on a budget. When I upgrade, what's a good 'table / tonearm / cartridge that won't set me back too much, but will provide enduring listening benefits?

Have seen MMF-1's and other entry-level models used on Audiogon at reasonable prices. But I am also curious if biting the bullet for MMF-5, Rega, VPI or similar tier would be a better long-term purchase.

I also love the look of the Basis 1400 and have heard some good things about them, but am more interested in realistic sonic matching with my other components...despite that really cool acrylic plinth.

Thanks in advance for all your responses, Audiogon has never failed to provide me real-world, meaningful suggestions. But I'm really afraid this is starting to turn into an obsession...LOL

Tim