I would focus on these pyramids (ranked highly)
According to US News, these are the top 10 high schools in VA.
Most of them are in Fairfax County
http://www.usnews.com/education/best-high-schools/virginia
The high schools in Fairfax Co. on the list:
Madison
Oakton
Fairfax
Langley
Woodson
McLean
All these pyramids are great