i have a 60 gallon cichlid tank (1 oscar, some pictus cats) and one out of 2 AC 300s has been acting strange for the past few months and finally broke down. so im gonng go to the LFs pretty soon and buy one of the above... which do you think would work better in my situation? also, since im kind of strapped for cash, do you think i can just get by, by replacing the broken AC300 with another?