The first question: how much money you got?
This is not a snark; money makes the world in general and the world of fencing in particular go 'round.
Remember, too, that a good fence does two things: it keeps something in and everything else out.
Second, what kind of terrain is involved? Flat, rolling, rocky, etc.? These can have influence on what you pick. It will also dramatically effect the cost of labor to install and maintain.
Third, how well trained to fencing are your horses? Do they constantly “test” or are they “fence avoiders?”
Assuming you can use standard t-posts on reasonably flat ground I’d recommend Electrobraid. http://www.electrobraid.com/ It’s not Canadian made (I have no idea where it is made and really don’t care ). Of all the “soft” materials I’ve seen it has the highest quality in look and feel. As part of my research I saw fences of this material up to five years old and they were in very good condition. Most tape is ready for replacement by that age. It has the added advantage of being portable if you chose to re-do a fencing plan.
Electric fences all have the same downsides. You must keep the vegetation at bay. In cold climates you have to plan for things like ice storms (that will coat electric fences, making them less effective), snow (which can bury them), etc. They have to periodically tightened, or maybe loosened as weather changes.
You might also want to consider that for a perimeter fence (which will be permanent) using a material like wood, slick wire, or even barbed wire (depending on what you need to fence out and fence in). For cross fencing use the Electrobraid (or other material).
Think “system” in all of this. What will be most friendly to your budget considering cost to buy, cost to erect, cost to maintain, cost to move, etc.
Good luck in your decision.
G.