Depending on how much flow you want a few Koralia 1s, or a couple of 3s, the 2s are the same as the 3s with smaller props, so you might as well go with the big ones. My tank has a 36"X18" footprint, I use 2 K1s pushing directly into my colonies, and a closed loop + return off the back of the tank pushing ~1200gph.
I'd love to have a Vortech as well, but am in your situation, and cannot justify spending that kind of money right now, I will later though
