Right now the plan is to go with a Aquaclear 70 HOB, with a possible upgrade to the Fluval 304, when I get enough parts to fix it up.
I'm trying to decide between an Eheim Jager or Aqueon Pro heater. I like the Aqueon Pro, because it's not glass and it's shows green when it reaches temperature. So, no light, and you have a problem.
The Eheim Jager has a more accurate thermostat and seems to run cheaper price-wise.
I've used Visitherm and Hydor heaters in the past. My Hydor failed after a month. The Visitherms were OK. One lasted 10 years. The other only about a year.
Not sure what other brands are even worth considering.