Far Cry 2: Prepare for looping. This game is way too repetitive. I'll get some action but the map is big and the missions very similar. Go here, go there, go there again, come back for more... and in the way I'll get lots of armed thugs at the crossroads, which later becomes a big inconvenient because you are just passing but they damage your car quickly and you have to stop to fix it and to kill the buggers. Multiply this by 4 (at least) in every mission or simple cruising around the map. Later you'll get a new map, but the situations are the same all over again... with the inconvenient that they now have mortars, rocket launchers and other "heavy artillery" power.
Mirror's Edge: Hm,. I don't know this game, never heard about it...
Fallout 3: To put it simple... the Oblivion scheme doesn't combine very good with fire weapons. I was very excited about this game, but when I got it... well, I was a little disappointed. The begining is terrific, but then when the action really starts, things get very hard at fightings... But the game is receiving very good ratings everywhere, maybe you'll like it. ;)
RaceDriver:GRID : This one is just another disappointing Codemasters game. After CMR Dirt, this is no surprise. Graphics are good, but gameplay is very bad in my opinion, it's too arcade and cheesy. It looks like a game made for american kids. I don't recommend it.
Race Driver 3 is the best yet.
Conclusion: Between the three games I know, go for Fallout 3. ;)