If you decide for an MC cartridge, I would buy Allnic Audio H-1202 phono preamp now in Agon. It won’t last long. I don’t have a direct experience with it, but Allnic phono stage is almost universally liked by all users, and its price is at your grab. I am actually tempted to buy that. For MC cartridges, you can go for a separate phono preamp and SUT, but I would bet Allnic is as good as any phono preamp + SUT at under $3000 or better.
Then, worry about selling your Cary SLP98P preamp and buying a line stage preamp that matches with your power amp. There have been many good advices so far. More may pour in, but too many causes confusion.
For turntables, research a little bit about different styles -- direct drive, belt drive, idler -- and choose one you like. I have all three kinds. If you want a used, it would be still better to buy one as a whole package, rather than buying a table, plinth, tonearm, cartridge, and headshell all separately. Also, shipping is always tricky, so look for something that is available local or within drive range. I bought a Denon DP-80 (with everything including an MC cartridge and HA-1000 head amp) from an audiophile who had kept it like new, and I was lucky.