suggestion for IBX in Washington DC

I need a recommendation for an IBX/colo environment located in the city of
Washington DC itself.. I know Tyson/McLean is Paradise but looking for a
good solution actually IN the DC portion of lata 236

Our main goals are Transit availability from good providers (Worldcom is a
must) and good peering options


talk with Level3 Communication. They have excellent collo environment and
interconnection with different providers. Email me offline if you need a
contact person.