In my humble opinion, a blade on the front of a tractor under 10,000 pounds is not a very useful device. For snow plowing they're of course great, and for backdragging, but pushing is pretty much limited to wood chips, and backfilling loose dirt. Don't expect to do much digging l like a tracked dozer.
If you think you'll have a use for one, (not on a BX) check into a 4 in 1 bucket which can tilt the "scoop" portion of the bucket back leaving you with the back of the bucket which is designed to be used as a plow blade, then you also have the advantage of the clamshell feature.
These blades they sell for the little 2WD garden tractors must be a complete waste of money! You could probably shovel the gravel quicker and easier with a hand shovel.
I don' t know why these items are sold unless its just to separate you from your money. It's all relative of course, I'm sure people who drive the BIG stuff look at all of OUR tractors with the same feeling!
You can also get blades that just replace the loader bucket. I have one of those for my Ford 1710 that angles left and right and by "dumping" the blade causes it to angle up or down on one side it it is pushed out on the left or right side.
This has worked well making mounds, angles etc. But as I mentioned, digging in hard ground is pretty impossible, the loader bucket works better since the cutting angle can be 5-10 degrees off being parallel to the ground, which seems to work best.
I've been waiting to get that Ford up to my other property that has ROCKLESS soil! Even some pure sand, should be marvelous up there!