Should I upgrade my phono pre??


My custom Rega with an Apheta v.2 sounds great and I sure have been enjoying listening to so many LP's on my stereo. My phono stage is an AD-50 phono option board plugged into an Accuphase E-470. But then in a moment of weakness I bought a table that I've kind of lusted after for a long time, a Luxman PD-171 with a 10" Jelco 850 series arm. The cartridge is an Ortofon Cadenza Black. After solving a vexing ground loop issue, and getting the cartridge dialed in just right, I was simply unprepared for a shocking improvement in every aspect of the sound. When I cue up a record I can't but sit transfixed by the music. 

So I THOUGHT that my Rega/Apheta was the bomb. I had no idea that the Lux/Cadenza Black would be such a thrilling upgrade. Now I'm wondering if I would get yet another leap in performance if I was able to invest six to seven thousand (used or new) in a new phono pre. The AD-50 SEEMS awesome, and I'm a sucker for anything Accuphase, so my question is: Should I be shopping?

oranfoster
Yep - in my experience too, music sounds notably MORE dynamic and alive with a SUT than with an active MC gain stage, even an excellent JFET stage like in the Herron. That's what I love about using SUTs. And this difference increases as you get into lower output MCs like the 0.3mV Koetsus.
@millercarbon,
     Your post should earn you a commission from Herron Audio. You sold me on one. I’ll start with that and keep my eyes peeled for a great SUT. 
     I’m terrible because I’ve never been a huge fan of the Zesto design theme, but I think it really works well for their SUT. Now I just have to sell a couple pieces to make it happen. My Benchmark DAC3 HGC is awesome but my analog front end is getting so engaging that I’ll let that go and rely on the DAC-40 board that’s also installed in my Accuphase E-470. Hardly a compromise....