MAC NC37

HELP. i CANTAFFOFD TO KEEP BUYING MAC YET I WANT A NICE FOUNDATION. IM NC37 ATM IN STUDIO FIX. I NEED A FULL COVERAGE TO COVER MY ACNE. I WAS ALSO WONDERING IF ANYONE HAD COLOUR MATCHES TO MAC AND LAURA MERCIER SILK CREME ? AS IVE HEARD THATS A GREAT FOUNDATION. VERY EXPENSIVE I KNOW. BUT WHEN I HAVE MORE MONEY I WANT TO TRY IT. PLEASE HELP ???