my only worry is getting upset by starring at an empty tank. I could not afford to get the 120 setup so quickly, it'd take me a couple months to have it full of water and sand, much less livestock. While the biocube I could get up and running in like 6 weeks or less. (plus a little to put good livestock in it)
I don't want to do like a 55 as I had one before and it's too small to do anything good, but too big to be easy...
I was looking at like a 14g biocube and getting it cheap off craigs list and seeing if I could keep up with it, but I really really want a 120, I just don't know if I can afford to stock it enough to keep me engaged.