Handling huge data in Dashboard

hi all,

1. A Dashboard has to be developed which shows lets say salesgroup wise data.
But query is designed in such a way that Plant and Material must also be taken otherwise the data does not come correct.

The problem is that sometimes in this case data are too huge that it cannot be handled by dashboard. 

So, can I display this data anyway in dashboard or is there any alternate tool to do this other than webi.

2. The conditions in BEx query are not supported in dashboard, So is there any solution to this.

3. Can I remove rows which have 0 values in Dashboard

Thanks and Regards.