I stuck with 256MB for a very long time perform video editing on the road on a p3-600 MHz. You should be better off than my old laptop.
Try a little 'optimizing'. It's just as much payback as more RAM but less costly.
My Dell have Samsung a pair of 128MB in 4 slot of Rambus. I had been very diffculty to find this Rambus memory. Should I change motherboard for DDR2 or stay with Rambus and just add upgrade memory. Would it still fast than DDR2? I was thinking plan to buy new Dell again. My is Dimesion 8250 has 2.4 533Mhz