trickle filters=high nitrates
i have an 80L tank that is setup without a sump, having it like that makes the tank look messy and cluttered and for that reason alon i wouldnt have
sumps are great, cannister filters are ok for putting in different media like carbon (even some of the bigger reefs on this site use them) but not for ceramic noodles etc
skimmers are great and you can see exactly why after using one.
water movement is very important as well