Toro Zmaster 52 or 60 Advice for Homeowner

I just moved to a new property that's approx 3.5 acres. I've decided to take care of the lawn myself and narrowed it down to a Toro Zmaster 3000 series but can't decide on a 52 or a 60. I live in Florida and the lawn is pretty flat with some slight changes in elevation but nothing i would call a "hill". I don't have any gates yet and, walking the yard, I think I have enough room to use a 60" around the yard with just a few trees here and there I need to navigate around. With that said, I don't know if there would really be any difference between a 52 vs a 60 as I don't plan on using this for more than my yard and if 8.5mph vs 10mph is really worth the uptick in price. Any advice or something I'm not thinking about that would drive me to a 52 or a 60?

I would go as wide as the yard, obstacles, etc. allow. IMO if taking full advantage of the extra 8", that can be a huge difference on the acreage you have.