nice tank i have the same one, got my one stocked with a female bifactiatum about 8 inches (keeps laying eggs) a albino gibby pleco and 2 talking spotted catfish
chucked in a fluval 4+ filter to back up the 205 that came with it.
btw i wouldnt use sand as some guys are saying as grains of it can get into the impeller heads on filters etc and greatly reduce their life span and some sand can drastically alter the ph level eg raising it for malawi cichlids also wouldn't sand be a pain when using a gravel vac wont it just suck up tons of sand?
for the fishless cycling id just dump in some prawns and let them decompose that will add plenty ammonia and only when ammonia and nitrites are 0 with high nitrates i would do a big water change, then do another water test if nitrates are below 20 and the rest at 0 you can add the fish. (worked on a 2 foot tank very well before chucking in salvini fry/juvies)