If you dont get tired of 50% weekly water changes, more power to ya!
Though you do realize thas a pretty typical community tank, with tetras/rasboras and a school of cories, though many people get more fish for the upper water column but your tank is pretty tiny and your already pushing the envelope with the stocking. Make sure you cycle the tank, and dont add all those fish at once. I'd fishless cycle your tank, and definately overilter a bit. For a good filter Id go for a bio-wheel 100. Its only like 20$, and it will keep your tank much cleaner.
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