I bought a 6500 (I think) from CR last year, 6 panel switch for $180, and it has been great. Used it / needed it 3 or 4 times now.
It powers 2 fridges, 1 deep freeze, the well pump, the sump, an entire family room to keep the wife and kiddos happy, and the house fan. If we're out for any length of time, I run a cord from the outlet running the garage fridge up to the garage door opener.
Once this basement is done, I'll switch from powering the upstairs family room to the new family room downstairs and the shitter pit, so we can stay in a nice cool basement if we lose power again when it is 98 degrees.
Super simple to install. Beats running a 150' cord over to my neighbor's exterior outlet and running a ridiculous amount of crap off of a spaghetti mess of cords.