I think I got it... so your saying that the 9500GT is not suited because it is not that far from 8400GS...
500Mhz Core speed
1250Mhz Shader speed
333Mhz Memory Speed
550Mhz Core speed
1400Mhz Shader speed
Can not find the Memory speed in the details... but I guess it's RAMDAC? If so then 400Mhz.
But I see that it is sending the data faster than 8400GS which sends only 6.4 GB/sec and the 9500GT 25 GB/sec. But hell I'm not and expert... thanks for the info mousemonkey. I'll see with the 240.
Here's a screenshot I used some time ago to show the difference between my 9500GT and an 8600GT. Check out the bandwidth of the 9500 compared to the 8600.