How much current would you design for the various supplies required for Spartan 6 LX9 devices?
Why not ask Xilinx, since they are the ones who designed the chip in the first place-- and it is in their best interest for them to help you successfully design your board?

Of course the best place to look is in the datasheets.  The second best place is in the Xilinx Power Tools Tutorial.  After that there are lots of app notes, user guides, and white papers on the Xilinx web site that talk about techniques, modes, and development tool options to reduce power more.  And don't forget the many reference designs that you can download the schematics for.

Finally, Xilinx and/or your distributor will have resources to help you.  Field Applications Engineers can provide design assistance, as well as review your design.  

While people on electronics.stackexchange can give you assistance in this, it is not a replacement for using the documents, resources and tools that Xilinx has already provided.