I personally trained under Jorge Popovitch (
http://www.bjj.org/a/people/popovitch-jorge.html) privately for years, and have spent time with Pablo Popovitch (
http://www.bjj.org/a/people/popovitch-pablo.html) refining some techniques as well.
Bjj.org is updated very often, and I believe they have both exceeded they're current rankings listed on there.
They are both major contributors and the highest ranking members of American Top Team.
http://www.bjjcenter.com/
http://www.bjjcenter.com/location.php
http://www.americantopteam.com/
http://www.americantopteam.com/locations.php
Some of my best friends attend the Gracie School in North Miami Beach.
Their school and facility are top notch.
They often have special guests and seminars by Helio, Royce, Hoyce, and several other Gracie's if you're into the whole name brand.
http://www.graciemiami.com/
http://www.graciemiami.com/contactus.htm
I know Anthony has some good input on this as well.