RedSub BT5110 - the Ibanez Promethean in a less sexy enclosure. I've had it over 11 years now and it's been as good as gold. 250W in the 1x10" combo, 500W with 4ohm load. Removable head. It has been played most weeks since I got it and keeps coming back for more. I have not been kind to it - left it in the car boot I dunno how many times in the cold, taken it into venues on a few occasions where it has been covered in condensation, just accepted it and kept on going. I'll try to be less lazy in future.
The only thing that ever went wrong with it was the headphone jack needed replaced about 6 years ago - amp would mute itself sometimes, bad contacts on the headphone jack was the cause. Since then it hasn't skipped a beat. I've used it with various 4x10 cabs with the head removed but these days I don't remove it, I use the 1x10" combo and stick another 1x10" cab underneath for a 2x1x10" setup.
It's a pokey, mid heavy little monster, a little obnoxious and boxy on its own but it certainly makes itself heard in the live band context.
I will be very sad and a little lost when it dies.