We have a few speedrites, which work well. They are easy to get rebuilt if needed.
I'd get one a size or so larger than you need, so if grass grounds it out there's still enough power.
For now a 110 one will work...only need a mile or so....
I agree on getting one larger than you need and one that is easy to have rebuilt, especially if you get a lot of lightening. What you're keeping in/out makes a difference as well. Our horses don't need much at all...I think static electricity would turn them around....on the other hand, our goats require something that will HAMMER them to turn them around.
