Aqueon also makes a great filter, shoot for 5x filtration, which means get a filter that is about 1200 LPH. Not sure if they make a filter that big, but someone else can recommend another filter and fix any of my errors I might have made
Just to add my two pence, I've got a 240l tank too, I use a 300w heater and a two Fluval filters (205 and 305) they work great! Bit overkill having both filters, I'd recommend either the 205 or 305.