2213 would be my pick because you can easily turn flow down without harming the filter. The inflow and outflow are the same size, so that is really convenient when buying replacement tubing or picking up add-on fittings. 2213 would come in handy for future tanks that are a bit larger, as well.
That said, an Eheim 2211 would get the job done but there's not much room for upgrades and such.
Assassynation: An in-line heater could work (I've used them on my cubes in the past) but you would absolutely need a temperature controller to prevent cooking your tank. Though, I would just use an HOB for an Edge and hide a small heater inside the filter.