On a tank that size you could get away with weekly to bi-weekly water changes and a good skimmer. Keep your bio-load down and feedings light.
A hob filter with floss isn't all bad. Helps remove larger detritus particles. You could still use the HOB running carbon in it. The floss would have to be replaced often to prevent it from becoming a nitrate factory.
What else do you have for flow in your tank? How many pounds of rock do you have in there?