I use electric mesh fencing for my Boers. 100% success rate - never an escapee, even when the buck is on one side and does in heat on the other. You can sometimes find Powerfields brand on
Amazon for $85 per 165' and you can ALWAYS find it at Premier1Supplies and FarmTek, but their prices usually run closer to $1 per foot. It comes with posts already set in the mesh, you just walk along and push them in. Premier1Supplies is an AMAZING resource for all things relating to goat containment. Order one of their catalogs - it is literally like an electric fence handbook - SO MUCH information.
You definitely need a good charger for any electric livestock fence. I have a 1-acre lot fenced with electric mesh, and it stays HOT with a Parmak 6v solar charger. That charger has been in use 24/7/365 since December 2010 - so almost SIX YEARS - and will still hold a charge and zap the heck outta anything that touches the fence. It was a pricey purchase, but worth every penny.
The other 3 acre lot has TONS of cross fencing in it, so I have a 50-mile AC Parmak charger on it. It generally reads in the 17-18 volt (or joules???) range - WICKED freaking HOT! It shoots sparks out a good 1/2" or more when you hold the gate handle near the gate hook. I am NOT touching it to see how much it hurts!
The great thing about electric mesh is that it is portable - you can easily move it around, and it deters animals on BOTH sides of the fence.