Use this site.  US News always gives the best insight to the rankings...You'd find what you need there.  Don't just jump into one just coz it has numerous Neps there.  Look out for yourself.  A sacrifice today will be worth it 2 years down the road:

http://grad-schools.usnews.rankingsandreviews.com/usnews/edu/grad/rankings/rankindex_brief.php