BRS is really high on the Cobalt NeoTherm heaters. Not cheap, but in their testing, they found it the most consistent at keeping a stable temperature. Remember that most titanium heaters do not come with a controller, so that would likely be an additional piece of equipment to buy - unless you do get an APEX. You can get a stand alone temp controller, like a Ranco controller. They cost as much as some of the NeoTherm heaters though. You could try a InkBird controller, but there are reports of those not holding a constant temp. I have a couple of them and they did ok at first, but are drifting now at holding temp. The one I have on a tank now is set at 78° and it is showing 80.2 at the moment.