I'd also suggest to not buy the Open Pros. Their inner diameter is smaller than that of the 719s and given that you want to run tires >32mm this would not be a good idea on the Open Pro. Especially when touring fully loaded this creates too much stress on the side walls. The A719 is rated for 28 to 47 mm tires which sounds like just what you want.
32 or 36 spoke? Doesn't matter much for the front wheel. 32 is fine but 36 won't slow you down much either.