If you are holding yourself up with your arms when you ride, don't buy a sport bike. You will hate it, even if you find risers. It's a common issue for many people but if you try to ride a sport bike like a cruiser or a touring bike you will be incredibly uncomfortable.
I carry very little weight with my arms when I ride. Remembering that the lighter the touch on the bars, the better the bike will handle. I try to look for 1/3rd, 1/3rd, 1/3rd between my legs, butt and arms so I can shift my weight accordingly. It may have to do with your posture. Try keeping your back straight, you arms and neck loose and rolling your pelvis forward. (this really worked for me when I was having back/neck pain) This will shift more weight onto your legs and off your tail bone and wrists.
I find my R12S is way more comfy than my K12RS. I can ride it all day and have done 300 mile stints of aggressive carving and felt fine afterwards but that's just me. I'm 6'1" 200lbs and 45 yrs.