If you are looking for a Espionage or Modern D20 ruleset, look no further than SpyCraft.
Enhanced gear and gadgets allow any budding Bond wannabe to equip themselves with the latest high tech equipment. Good selection of character classes and feats. Game runs smoothly though can be tough for new players to get a handle on it. Once they do it's well worth playing.
The game also has a number of supplements/mission for GM's to use.
Only Con that nearly caused me to knock a star off, is that the tables in the book are laid out oddly and difficult to find.
Book is well laid out and easy to find what you are looking for. Rules are base upon Crafty Games MasterCraft ruleset, which uses the D20 OGL. Saying that FantasyCraft is yet another D20 fantasy game does not do the MasterCraft ruleset justice. Crafty has taken D20 to a new level.
Character classes and races offer a rich environment for players to enjoy. Gameplay is straight forward and easy for new players to understand.