I need some turntable guidance

From first hand experience I can highly recommend the new Rega P8 with the Alpheta 2 cartridge.can be had for 4K or a little less and it’s really nice.

preamp-  Mac C2300 tube and has built in phono

Krell MCX 350 monos and PBN Audio KAS speakers

Mac MC275 tube amp and Klipschorn speakers with Volti upgrades

It's very hard to believe you have the system(s) listed above, but you don't have basic answers already to the beginner-level turntable/vinyl question you're asking!  You're either pulling our collective leg, or else you've inherited these components, right?

But if you're sincere, and those are your  system components, I'd say budget minimum $15,000 for turntable, tonearm, cartridge, phono stage (better than Mac built-in), cable, set-up 

Have you considered ClearAudio?
I sent you a pm earlier.

@Elizabeth, excellent advice.  I've used a Technics SL-1600MK2 since the early 80's.  I have 1200+ vinyl albums.  Earlier this year, I setup my first dedicated listening room and, while I still have the 1600MK2 in my rec room setup, I purchased a 1200G w/ Ortofon Quintet Black cartridge and a Parasound JC3 Jr phono pre amp.  I absolutely love the sound. 

To take my analog music to another level, I was planning to buy a Herron phono pre amp before years end.  I have a Herron pre-amp, Innous MK2 media player, Audio Mirrror Tubadour III SE DAC, NAD M22 v2 power amp, and Tannoy DC8 ti speakers. I can honestly say, my digital music sounds every bit as good as my analog setup - to my ears.  Many of my friends think it sounds better.

I'm 71.  Getting up and down to play vinyl isn't a chore, but lately, I spend much more time just relaxing and streaming Tidal or playing ripped CDs.  I considered selling my new analog gear and using the proceeds to buy a really good tube stereo power amp or some mono block amps.  I don't play vinyl enough anymore to justify the money I've spend on my new analog gear, but, at least for now, I just can't bring myself to sell it.

Time will tell :-)

   Interesting topic to which there is no end to opinions. I have owned a few tables. The one that I still use is a Pioneer PL-530 I bought new in the 70's. Simple maintenance has been done since I bought it. I was lucky enough to have a dealer close by that sells all the rest of the equipment in my system. Brought some of my favorite vinyl to their shop and auditioned tables such as Rega. None of them sounded superior to the Pioneer to the point that justified the large cost outlay of some of the new age tables.   Sure, there are other factors that influence sound...room acoustics and others. From my experience, the cartridge and stylus are the most important factors that affect the performance of a turntable assuming that the table has at least decent workings. Cartridge selection is almost as subjective as speaker selection when it comes to listener preference.