If you runs aren't too long (less than 2000'), I'd recommend the braided polywire from powerflex. I've tried many different brands, and like with most things, you get what you pay for. It is the best bang for the buck. I like their custom reels too. Stafix and Gallagher both make very good temporary fencing products, but again, you pay for NZ quality. Like mentioned before, Kencove is also a really good, and affordable source, of all things electric. Quick shipping and good service. As far as posts go, buy a few different types and see what you like. I personally like the step in pigtails...but we usually just use one wire. Some folks prefer the O'Brien plastic posts. Having a t-post to make hard corners or a wood posts to stretch from sure helps. Also, don't skimp on a good charger, and make sure you ground the system properly. Do all that, and properly train your cows to electric in a lot, and you'll never look back. We move cattle from daily to weekly, depending our schedule and grass load. An atv or UTv with a reel holder makes the job extremely efficient.