Oh good point... I've never kept Oranda before. Didn't even think about that.
For some reason even though I know what works I always have the urge to try something new
I think I may go with a pair of the next size down so that I can put one near each end of the tank. My planned aquascape has some things in the middle of the tank that might make placing a filter in the center difficult and I don't want circulation to be inhibited by having to place it down at one end.