I have been gradually adding Morrow cables (mostly MA3) to my system. I am very pleased with the value they offer, and I really like Morrow's business model. But the burn in process with Morrow wires is for real. I get them with a 10 day burn in from Morrow and they still go through noticeable changes. If you want to try them, make sure you can put several hundred hours on them within the 60-day return period. If not, pay up for the burn in service from Morrow.
BTW, I used to own a Connie PV11. A wonderful preamp. I only had to let it go because I needed more range in the balance control than the PV11 provided. Otherwise, I might still have it.