Thanks for all the advice on this. I decided to pass on the tires. I didn't think the deal was there, plus the 225/70 tires just didn't have the weight carrying capacity that I desired when stepping up to a 19.5". I think I might try the a Nitto style tire with the 3750# rating and see what I think, it might just work fine for me. I don't put a ton of miles on, so it might just work for me.
I don't have to deal with some of the extreme heats some of you southerners have during the summers, so that should help too.
Thanks again.