Cartridges

It looks like you already have a solid base for vinyl reproduction, so yes, you're probably at a point where better vinyl would be a wise way to spend your money.  More music!

Before spending on a new cartridge, I'd look at your phono stage as the next upgrade.  

I’d say both, but if I had to pick one, it would’ve the good recordings/pressings.

My "premium" cartridge makes every LP sound better, even the crappy mid-80's pressings.  Old 1960's folkways sound great too.  A good cleaning and a good cartridge really make a difference.  But a great turntable is a real plus.  

Having said that, some of the newer audiophile pressings are sounding superb.  Really black backgrounds.  

Love It!

Based on pindac’s comments, my Transfig Atria is already worn out! I got it used from a family member already on the VPI and it’s probably 8 yrs old. He’s an avid listener too. I didn’t know carts had such limited lifespan. However, the lower freq is the only issue my ears detect in the Axia. Bass punch not as good as the digital side or even as good as the vintage Technics table I set aside with a Grado silver MM. I’ll do some research on cart wear and the exact makeup of my VPI tonearm.

"I got it used from a family member already on the VPI and it’s probably 8 yrs old. He’s an avid listener too."

A fresh stylus may be all that’s needed. Bass punch should be at least on par with your other sources, but it is cart model dependent. Some are more prevalent than others.

I wouldn’t get too caught up with all the comments on reality of VPI’s "inferior" design. As mentioned, I use the same model, and there is no shortage of the spectrum low to high. For reference, I have heard plenty of uber setups throughout the years. And yes, an unmolested period copy for $3 bucks of most anything can sound spectacular thru the VPI Classic, but setup and phonostage flavor(SS or tube)can be a game changer. I use an all-tube setup.