Carl, I have heard the LO4, it is an excellent cartridge. The last cartridge I used before my Koetsu Rosewood Signature Platinum was the Benz Ruby, from the same family of designs as your LO4. My choice in audio cable is Purist Dominus RLS. My Aesthetix IO is the version with no volume controls, and I run it into a Viva single ended preamp. I have two outboard power supplies on my IO (custom built by Jim White at Aesthetix) and I have a Callisto ordered from Aesthetix with two outboard power supplies as well. I plan to couple the two together in balanced, with the IO at full out, and run single ended out of the Callisto to the amps. We will see how it works out. No Jacintha yet, but I plan to buy it. I have been spending too much money lately on E-Bay for LP's and with Mosiac Records.