8400GS is not a good game card.
I suggest you buy 9800gt which you can get perfect gaming experience with but maybe you tell me your budget first.
however,left 4 dead is not a game that needs extreme high-end graphic card.
I would say 4850 512M at $129 but 4870 512M at $149 got the best Cost-effective.
so why dont you pay 9 dollars more than your budget to get one perfect card?
you can turn down the video options to get higher fps(frame per second),and there are some options you should think firstly when you really need to turn the options down.
such as antialiasing,VSYNC,reflect,etc.
do you mean dot by dot with a lcd tv?
1.make sure your tv resolution meet your graphic card's output.
2.use the HDMI cable.it's not the only way but it's the best way.
3.shut down your tv&graphic card's "overscan" function,and this is very important.
yep.Both GRID and Jericho support XBOX360 controller perfectly.
actually in Jericho there is "auto aim" helping you to aim much easier with a controller.
yeah,Grid is great.its graphic is much better than NFS11 but it's quite hard to handle the car...I tried a few times and I gave up.
I recommend the game Jericho.