I have always heard great things about the riding position of the Hayabusa. Its not the corner carver that the 3 you named are, but its an all day freeway rocket, thats for sure. Any of the bikes just outside of the main four focused sportbikes (CBR, ZX, R, GSXR) mostly have a more relaxed position. Since yuo are a HD guy you also may want to see what a v-twin engine is like when its raped, such as a Ducati, SV1000, VTR1000. ANother great classic ride is the Kawi ZRX1200.