You have to get a high performance laptop with a niceprocessor and a good amount of memory or use an external. The only issue with laptops are that you get less performance for the price but if you get a really nice one that would be good here are a few options:
toshiba:
http://www.toshibadirect.com/td/b2c/laptop-family.jsp?family=Qosmio
these are real nice
hp:
http://shopping.hp.com/en_US/home-office/-/products/Laptops/HP-ENVY/A9P83UA?HP-ENVY-17-3290nr-3D-Edition-Notebook-PC
The list goes on for a nice laptop for video editing expect to pay from $1,500-$2,000. If you look online for gaming laptops that will get you what you need.
