magnepan 1.7 or 3.7 vs spendor s8e

Enjoying a spendor s8e now but have caught the "green is greener..." bug and am considering uppgrading my system.

The new magnepans caught my attention as I like live music renderings, jazz, accoustic music and sometimes large classical ensembles...rock/pop occasionally but not why I bought my current system.

Would the magnepans be an upgrade? What would the main differences be?

thanks!!