I had the 1.6QR's and drove them with a Unison Research Unico integrated amp (80watts @ 8ohms). The Unico handled the 1.6's with ease.
Totem: Greater pinpoint accuracy when it comes to imaging than Magnepan. Will disappear sonically in the room when setup correctly. May have edge in dynamic range but that can depend on room and equipment too.
Magnepan: Larger sound field which will be slightly more diffuse than the Totem. More enveloping sound. Intimate sound with acoustic music.
Since you said acoustic jazz my gut says go with the 1.7's.
Totem: Greater pinpoint accuracy when it comes to imaging than Magnepan. Will disappear sonically in the room when setup correctly. May have edge in dynamic range but that can depend on room and equipment too.
Magnepan: Larger sound field which will be slightly more diffuse than the Totem. More enveloping sound. Intimate sound with acoustic music.
Since you said acoustic jazz my gut says go with the 1.7's.