missed the rear beam part there.......
as for rear beam set up there are a few ways to go...
1)standard rear beam poly bushed..
2)standard rear beam with twin anti roll bars fitted.
3) fit the stiffer zetec-s rear beam..
personally I run the standard at the moment with poly bushes...
If I changed I would go for indepndant arms.. but thats along way off at mo...

Biggest change is messing around with the poundage of springs to get the desired feel from the backend..