There are a lot of options for box blades and everyone who bought them rave about it. However, I'd bet that 95% of the BB owners on TBN just use a conventional BB. T&T is cool, too, but I think most people get by without it.
Including me. I have a Woods BSM72. It serves me well but there is nothing to recommend it over others of same weight/price.
If you have any obstacles at all on your property, I would suggest a BB that is only a little bit wider than your tractor. You would be amazed what happens when you clip something! Something gives and it might be expensive.
You are thinking about a 7' blade. A heavy blade, which is good. Weight is your friend. You certainly have enough motor to pull one. But your tractor is no heavier than mine and my little 40hp will spin all 4 (r4) tires when running the 6' BB on dry ground. And that is not necessarily when its hung up, either. A full box with an aggressive chin down attitude can bog down my 5,250lb tractor w/FEL.
For road maintenance you generally won't use the rippers. Many BBs have the ability to reverse the rippers in their mounts (i.e. pointing up) to get them out of the way. The Woods won't let you do that with the center rippers as the top link plates are in the way. It's kind of a pain.
For recontouring pasture or ripping up field beds for gardens, the rippers w/BB work pretty well -- they'll move dirt around. But it isn't a tiller or cultivator. A BB won't make a bumpy, grassy field smooth. Oh, and raise the BB before you turn, too!
So I think a heavy 6' conventional BB will serve you well. Enough of this heresy. On to the posts who'll recommend spending more money!
Bob