Even if you buy the SME don’t expect mind blowing- not even close.
Your phono card hasn’t even begun to show the performance of your Technics. The same can be said of your cartridge.
I’ve got a 1210G that I love. It took 3 cartridges to find the right one for my tastes and system. I already had a fantastic phono stage.
As good as the SME deal is, I’m guessing another $6-7k to get the performance you seek. Why not spend that same money to improve the system you have? Buy the nicest phono stage you can get and a $1500-2000 cartridge. That’s what I’d do because that’s what I did.
If you decide to buy the SME, make arrangements to pick it up in person. You know what they say- if it seems to good to be true….