Just an observation, if you are planning on staying with an older 4:3 display, I would not recommend spending a lot of money on a video card. Even a GTX285 would be overkill, in my estimation.
Will not get into the whole LCD vs CRT debate here, as that is beyond the scope of this thread. However, as gaming is clearly something you value, and given the class of card you have selected as a potential purchase, I would strongly recommend you at least consider replacing your display with a widescreen display in either a 16:9 or 16:10 aspect ratio. Gaming at resolutions above 1600x1200 is truly a joy and given how much you enjoy gaming, there is no reason you should limit yourself when all current games support insane resolutions.