Need help buying a laptop

[dutchgrl]

I am looking to buy a laptop that will be able to handle pokertracker, poker-edge, PV, 2 sites with 6 tables total. I am interested in the Dell Inspiron, and I have a question about the processors. How do the M processors compare to the pentium ones? Are they as powerful. How powerful should the one I get be to handle all the programs without stalling?

Also, how many mb's should the videocard be?

Thanks!!!