I hear you on the price difference between 15's and 16's, but it appears that there are many more options for 16" 265/75/16 then there are for 32/11.5/15.
I have been very happy with my current 235/75/15 duratrac's on my TJ and i have 265/75/16 duratracs on my Silverado and would like to stay with them, but from what i can see they are not offered in a 32 for 15s.
Although I may be totally rethinking my plans for the TJ, My mother recently passed away and I am going to be buying her 08 jeep compass from the estate, only 16k on it and payoff is 7 grand. So long story short, my wife will drive that and I will go back to my Silverado for my DD. This will allow me to keep the miles down on the TJ, and avoid salt in the winter. It will also open up the options for what I can do to the TJ now that it will not be my DD......So many options