Iron Man 2 is doing well at the box office. The best Iron Man comics to read are those from the Ultimate line. Here're 2 recommendations:
Ultimate Iron Man Vol 1 by Orson Scott Card
Ultimate Human by Warren Ellis
Ellis is really the ideas man in mainstream comics now. His frequent appearance in DC or Marvel Comics add vitality to their line. Whether it is his revamp of Marvel's New Universe or Thunderbolts, Ellis never fails to deliver. (his earlier take on Iron Man, 2005's Extremis is good too)
For fans of Queen and Country, Ultimate Human has an entire tribute issue to that.