So I weighed one rim/tire combo and got 43.2 lbs on the scale. That puts the 17" sedan rim at about 22 lbs. each based on tirerack.com reporting the stock tire weight at 21 lbs. each. Hope this helps anyone who might be looking for lighter wheels.
23lbs on the work scale when I weighed the stock wheel with TPMS sensor without the tire. I didn't bother weighing it when I put the new tires back on. The Kosei K1's I have in 17x7.5 are a measely 15lbs each. 8lbs per wheel for a total drop of 32lbs is nice. Now if only I could drop the weight so easily!