I've been a fan of Gallagher chargers, I have two MBX 2500 Smart chargers, a M1800, M400, M80 and 3 Solar. I think a S90, and two S30. One charger would be big enough for everything but my property is scattered. The MBX adjusts the joules output automatically for what is needed up to 25. It has 4 LCD displays to measure Joules, Fence Voltage, Charger Voltage, Ground Voltage. You can plug in an alarm to go off if Fence voltage is too low or ground is too high. It also has a wire to hook up to a battery to use as a backup if you loose power. You can hook a solar panel up to it if you want to run just battery. One of the best features is a remote to shut it off anywhere on the fenceline. It sends a signal though the wire, great while fixing stuff. The downside is that the remote is a little big, and doesn't have a display for measuring voltage and fault finding like the Speedrite, so I carry Gallagher's SmartFix as well. If Gallagher would make a combination handheld compact unit, they'd have a great product. It could just be added, I think they make one for a bigger charger not available in this country though.
For wire I use GalFan from Kencove fence. I think it's 180K psi.