@luke_kerridge: Nope, the comic armors have marks too. In the movies a mark is just a new armor, in the comics they are only listed in marks if it is an upgrade of an armor that already exists. The stealth armor from the comics has 3 marks. There are a couple armors from the movies that are based on comic armors such as the silver centurion, extremis, original grey, and stealth.
@Iron_Man_Mk725: Back in 2005 good ol' Warren Ellis and Adi Granov teamed up to create arguably the most drastic advancement in Tony's armor, the extremis armor. The basis of the story was that there was this guy named Mallen who had obtained the Extremis enhancile that was developed over at futurepharm labs by the creative minds of Maya Hansen and Aldrich Killian (who are both gonna be in iron man 3). The enhancile pretty much took your nervous system and completely replaced with something that would turn Mallen into an out of control, but powerful monster. Tony flew over to confront Mallen but he got completely destoryed. Tony realized that the only way he would beat him is to use extremis himself but in a more controlled manner and under the supervision of the co-creator, Maya Hansen. After the process, Tony was completely one with technology. It enabled him to control his iron man armor with his mind so he could telepathically summon his armor and it would come flinging on to him. It also did stuff such as being able to make phone calls with his mind and see through satellites. It also made his mind into a hard drive which is explained in detail during the world's most wanted arc back in 2009 i believe. Tony was more powerful than Mallen now so he confronted him again and begrudgingly had to end his life.
The Bleeding Edge armor took the extremis concept and took it to the next level. His armor was stored inside of the hollow of the bones and he could mentally command it to come out of his skin whenever he pleased. The armor is extremely powerful and it's the armor Tony is currently using. It was created by Tony and also with a little help from Reed Richards. It can lift up to 500 tons (with boot jets activated) and fly up to speeds like 5 miles per second. You can read about the creation of the armor in Iron Man #500. I hope i helped ya