Progressive or progressive wound springs are an upgrade or not an upgrade depending upon your opinion. Personally, I don't like them. I prefer a straight rate spring chosen for my weight and riding style. I have Progressive 412 on my XS11 with the stiffest spring offered. That and the dampening limit the shaft jacking enough that I don't notice it. I need to add that I'm running straight rate springs with emulators up front, so that helps too. I have my laden sag set to 35 mm front and back. The down side to this the ride is very harsh. More laden sag is need for progressive springs and I want none of that. I have good pavement here in North Georgia and lots of curves. It works well.
To do it again? The Progressive would not be on my bike. I'd go straight rate on the springs. I would choose from YSS, Hagon, or Bitubo. All offer a good product at a reasonable price point.