In my opinion, most of Texas is the the best place in the United States to have highest opportunity at a 120-135" deer free range. You can go to Kansas and Illinois for lower opportunity at a 120-135", but higher opportunity at a 150"+ than Texas.
Ranches like King Ranch and what fouzman mention are exceptions for opportunity and high quality, but you pay for it.
I believe the best place to get opportunity, high quality, and reasonable cost is Canada.
I have put a bunch of time analyzing it and hunted Texas, Oklahoma, Kansas, and Illinois extensively. Haven't hunted Canada yet, but trust the people I've talked to.