I have been kiting for quite a long period. Have stuck to Dakine Fusion seat harnesses. Have broken ribs from my seat harness. Do kiteloops and will challenge most "Waist" harness guys to jump higher and throw bigger loops than me with my "nappy" on.
Have the same mindset , and use a GT 7 and GT 9 (mostly for wave riding) and bring out the XR 12 for lighter wind conditions. This combination of kites work well for me and mostly directional board riding. Spot on.