Turntable Choices

OK, so how do you like the sound of your system currently? Do you feel it's too warm or too bright? Do you have enough bass or too much? Does your current table (what is it, btw?) sound noticeable more rhythmic than your CD player, or not? It should, IMO. BTW, the MMT is not a bad arm, I would not be too eager to replace it unless you plan on spending a lot more than you are spending the table.

I like the fact that my system is on the warm side. I had a Krell amp that I found too analytical. I started analyzing the music rather than tapping my foot and enjoying it. So I went back to McIntosh. The turntable I had(I have a backup as well an Ariston RD11s) was a Micro Seiki DDX1000. The Ariston has seen better days and will be retired after I get a replacement but, I think it sounds better than the Micro.

The HW19 will be warmer and fuller sounding than the Oracle which while not the least bit clinical sounding is leaner sounding and less weighty in the bass. The Linn, you already have an idea of how it sounds since your Ariston is actually the table that the original Linn was modeled after. A modern Linn will be a significant step up in refinement over the Ariston, but a lot of the basic traits remain; nice pace and timing and good midrange. My concern would be that if your system is already warm as you like it, the HW19 might be too much of a good thing. When I bought my first HW19, I compared it to the Oracle and chose the HW19 because my system at that time benefited from the warmth and fullness of the VPI while the Oracle, while having terrific clarity, sounded too lean in my system. But man did it look cool!

My two cartridges are Transfiguration Spirit III & a Clearaudio Discovery. Tonearm is a Sumiko Premier MMT

Zimmy -- IMO, the arm is no match for either of your cartridges (I've used all of the above, the Sumiko on Pink Triangle). But it was very good value for money back then.
Any reasonably priced & well engineered modern arm --say the Clearaudio unipivot for example -- will give you much better performance from those carts.

So back to the TTs. My suggestion is that if you buy new, opt for a package TT/arm combo.
So if you do not opt for vintage or the Traveller, you might consider a Clearaudio package deal (called "concept" I think) which comes with the unipivot & is an excellent sounding combo.

If you end up going vintage, the Linn is probably the best value for money at this moment. There are of course many extraordinarily engineered Japanese behemoths or the ubiquitous EMT to choose from -- but these can easily set you back ~5k in the blink of an eye!

But again: you already have the cartridges to easily match a top level TT. My latest (and last Discovery) was on a Simon Yorke...

You will probably like the sound that comes from a Nottingham Analogue turntable