Voracity writes some wonderful SPN/BtVS fics.
http://voracity.e-fic.com/spnindex.html

Also, Children of Hunters by Vo where Xander and Speed from CSI Miami are turned into children and made Sam and Dean's sons.
http://voracity.e-fic.com/childhood/childrenofhunters.html

If you don't mind multi-crossovers I'd rec. Vo's Family Staff series, Desperation, and DCIS series.
Voracity's homepage is: http://voracity.e-fic.com/


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