Both of the ones you listed are IGP (Integrated Graphics) and NOT dedicated graphics. For a good (smiler to a mid range desktop) gaming laptop, plan on spending ~$1000-1500+. Keep in mind the 9600M (Mobile) != 9600GT (Desktop) in performance.
Out of the 2 IGPs listed, the 3200 is better.
You will need a dedicated GPU only if you plan on using a laptop as a serious gaming set up. IGP graphics are good enough for watching vids,etc.
For more info/comparison on mobile GPUs see:http://www.notebookcheck.net/NVIDIA-GeForce-9600M-GT.9449.0.html