I really liked kaiji. Its not exactly the most action-packed, but it was very well done for a gambling anime.
After watching Akagi and Kaiji, I can say I'm a big fan of Nobuyuki now. Both anime deals with psychology and in both anime the main characters risk their lives gambling.
Gyakkyou Burai Kaiji: Ultimate Survivor
Various gambling games are played and the main character Kaiji has to risk his life playing the games.
Akagi
Only Mahjong is played but it's still a great psychological masterpiece. The main character Akagi is more on the offensive and he breaks his opponents mentally.
You guys should give these a watch.
I really liked kaiji. Its not exactly the most action-packed, but it was very well done for a gambling anime.