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As far as I am concerned any major brand is basically ok, what matters is picking the right fencer for your needs and then, the biggie that most people blow right past, installing and maintaining the fence setup correctly.
I would not recommend solar, it is usually a pointless waste of money. Plug-in is the cheapest, plus IF YOUR GRID SERVICE IS RELIABLE then it will be the most reliable fencer too. If you just can't do plug-in, either because of unreliable grid service or because the fence will be soooo far (like hundreds and hundreds of feet) from the nearest usable outlet, then I would recommend battery operated, not solar.
(Note that solar IS battery-operated, thus subject to the same exact problems such as having to pay for a new battery periodically and the battery will be fatally killed if you let a grounded-out fence draw it down too low -- the only thing solar does is trickle-charge your battery for you and cost you a whole lot more money to purchase, especially if you compare equal-strength chargers)
Whether to get a rechargeable or single-use battery depends on how you will be using the fence. If it will only be on at night or part of the year, single-use might make the most economic sense; for continual use, rechargeable can become more economical in some circumstances. You'd have to price out your options and take a flying guess. It is not likely to make a *huge* difference one way or the other.
Without knowing what your fence will be like and what conditions you will use it in, I can't really make any more specific recommendations. Except, TOTALLY IGNORE this malarky about "charges X miles of fence", it refers only to basically-theoretical ideal conditions that have nothing whatsoever to do with anyone's real-world fence setup; also, make sure you buy a charger that pulses, NOT one of the always-on ones (few are sold anymore, but a few *are* sold, mainly marketed for use with dogs).
Good luck, have fun,
Pat