2006- Present, probably Manchester United. 2008/2009 season could be their 3rd successive league title and 2nd successive Champions League.
Manchester united are better than arsenal
As far as history, Manchester United has more trophies than Arsenal, and are currently doing better in the Premier league.
Arsenal is way better than Manchester United and Manchester City!
Arsenal has more trophies.
1993, 1994 - Man United 1995 - Blackburn 1996, 1997 - Man United 1998 - Arsenal 1999, 2000, 2001 - Man United 2002 - Arsenal 2003 - Man United 2004 - Arsenal 2005, 2006 - Chelsea 2007, 2008 - Man United
Manchester United, though the gap will close a bit this year in my opinion.
Manchester United and Arsenal are both considered to be two excellent teams.
em probaly man u even though there rubbush lufc#1