i got the rimless cube tank (10x10x10 inches) at a fish store in nyc, called pacific aquarium and plants on delancey street. the fluval edge is more readily available at big box stores like petco or petsmart, though. as much as i like the fluval edge, it is a challenge to set up as as planted aquarium b/c of the design. i did what i could do to bring in more light into the tank as seen in the photo.
you should go for it! never had a saltwater tank and stayed away from it mostly because of the upkeep and the monetary investment. freshwater tanks, on the other hand, can be kept much more inexpensively. i have small tanks because they're in my room and limited in space. but, yeah, this has been a very rewarding experience so far and will def keep it up for as long as i can.