The tall guys I kite with all ride the Mystic Majestic X harness. A couple have converted from the Ride Engine. Seems a good harness but they are a size up from me so haven't been able to use one on the water.

The Manera harnesses are the nuts as far as I'm concerned. The Exo is a nice all-round harness that slides a bit (e.g. when riding toeside it slides round towards the kite but doesn't slide up and down). I'm using the eclipse now and thats pretty locked in and super cool (plus its orange which has to be a good thing). The new Halo looks pretty sweet and I'll probably get one of those when my eclipse harness gets a bit worn. You need to get your sizes sorted though. The key is to get the right size spreader bar so the pull of the kite doesn't pinch your hips or pinch your back.

Ride Engine hardshells have a really pronounced lumbar bulge. I myself have a hollow lower back shape and RE Carbon Elite fits me much better than Mystic X and Stealth - both feel like leaving quite a gap between the shell and my back. Using the harness in size S with 280 Stealthbar, 31"(77cm) waist here.