Wow. You raise so many questions.
1. Where are you?
2. How much do the Madisons weigh, and how do they stack up against, say, old MN Eden 410s? I had a bad experience with a 212, recently, but those 8s make me think they could be perfect. I'm using a pre-Fender SWR SM400, for now.
It's all in the hands.
Fender Jazz Bass Club #928
Fender Longhorn/Boner Jazz Bass Club
Properly-Medicated Brooklyn Nets Fan