JWM10 with TNT Cartridge help PLEASE

You have gotten an excellent front end, one good enough to merit a top cartridge. Two cartridges that should be on your "short list" are the Grado Signature and the Shelter 901.

I'm thrilled with the Benz L2 on my JMW 9 (I also use the isolator).

To my ear, it sounds a lot better than the Shelter 501 mk 2 it replaces.

500 people or so will probably write and tell you not to put the 901 0n the jmw10. FWIW, I did (Aries 2 & jmw10)and I enjoyed the combo (and will again if my 2nd arm wand ever gets here).
A popular and less costly way to go for your set up is the Dynavector 20xh or xl, I had this combo (the xh) and it was really very good for the money. If I was smart I could have stayed with it and been happy.
Above is all IMHO & I know didly about the two cartridges you mentioned.