You should probably pick up that $60 9600 GT. In all honesty on a 19" monitor a single 9600 GT is more then sufficient. Unless the game in question is Crysis @1440x900.
yeah, +1 for the 9800gtx, plus when better games come out, you could still sli to play them at good resolutions, while if you get 2 9600gt's, well you get the idea.