Substrate wise, I use gravel (don't tell anyone - but I get it from the beach, either Whirinaki or behind where we have our meetings). I have been using Dalton's Aquatic mix, but am going off that as it seems to contribute to algae problems a few years down the track.
I am going to redo my 400mm cube with JBL Aquabasis Plus and see how that goes - it is currently a green algae wonderland at the moment...
I use HOB filters on two of my two footers, they are fine, you can turn the pump speed down on the top, and if you have the water level up so that it is only about 10 - 15mm from the bottom of the waterfall bit, it doesn't seem to create such a current.
I have both AquaClear and AquaOne, I prefer the AquaClear as it has a basket thing for the sponge and you can add more biological media (ceramic noodles) to it. The AquaOne has cartridge type filters, I only use the dacron type one, removed the carbon filled one and filled the back cavity of the filter with noodles.
I will bring the plants to the AGM, how did you go with the Paradise fish from Woodville?