One side of my pasture is 5' horse safe
fencing. It has held up very well, although a flood some years ago pushed
over about 100'. My neighbor used his tractor to help me pull it back into
place, and...so far so good. I placed it so it goes all the way to the
ground because the field next to mine is planted in alfalfa and I didn't want my
boys getting creative.
The rest of my fencing is Centaur (a belt-like
vinyl with high tensile wire inside). I think RAMM is the same thing but
cheaper. I've been extremely happy with the Centaur. The horses rub
on it and push against it and it still looks very good after 10 years of no
maintenance other than occasionally replacing a belt loop. If you go that
route, I recommend the brown. The white seems to collect dirt and look
more raggedy.