The advice provided by ntt and stingray25 is simply not correct, as a number of other members have been at pains to point out. A single oscar in a 46g bowfront would be a stretch; two would be impossible both because of the crowding and the overloading of the filtration system.
Stories of oscars raised to full size in 30 or 35 gallon tanks are not helpful, in that they may encourage others to keep fish in unhealthy situations. We should always err on the side of safety and responsiblity in providing information, especially to new or returning hobbyists.
gonefishing: when you say that your water is soft, do you mean it is low in total dissolved solids, or that it is being treated by a water "softening" system? If the former, please provide pH, GH, and KH readings; if the latter, your water is not really soft at all but has been treated chemically to make better soap suds. Please clarify. And plan on some smaller fish. If you would like a list of nice cichlids to try out in your tank, why not start a thread in the cichlid forum? I'm sure you will get plenty of responses.
Thanks.