@drbond - you need to make sure the phono stage has lmpedence (load) and gain settings that match what is recommended for the cartridge. Many good ones have several or even continuous settings for these.
Some phono stages are made to work with their own cartridges. I have a van den Hul cartridge and if I wanted to really splurge, I would go for their phono stage, but I don’t want to exceed what I spent on everything else for a cartridge and phono stage. From the numbers you were throwing around, it might fit your budget. I was told that combo was part of a $400K system that won best in a show against 7 figure systems.
The output from the phono stage can go to any regular line input of a preamp. Ideally, the preamp is just a switching box and volume knob without affecting the sound. Personally I like to KISS and go with an integrated amp and avoid an extra interconnect and power cord and save $$.